Windows 7 ent key

Windows 7 Enterprise Product Key Serial Key Free [100% Working]

Windows 7 Enterprise Product Key Serial Key Free Latest Working For Windows 7, Windows 7 Home Basic, Windows 7 Home Premium, Windows 7 Ultimate, Windows 7 Starter, Windows 7 Professional Keys.These Product Key, Serial Key, and Activation Key Work On All systems 32 Bit and 64 Bit. these are working Keys.

Windows 7 Enterprise Product Key Overview :

Windows 7 is the best and Excellent Operation System After Windows Xp, and Windows Vista. its Come July 2009. When Windows 7 Come a Billion of  People install This Windows 7 in our System and Delete Windows Xp Because Windows 7 a lot of Features that why This Windows 7 is much Popular and Microsoft Launched many Versions of Windows 7 like Home Basic, Home Premium, Ultimate, Starter and Professional. When we Install Windows 7 In our system and we need to Active This Windows 7 so we Need a Product Key, Serial Key,  Activation Key. These Below Product Keys are 100% Genuine and One Product Key work on your System. Windows 7 Product Key or Windows 7 Serial Key or Windows 7 Activation Key is 25 Character Code like XXXXX-XXXXX-XXXXX-XXXXX-XXXXX.you do not need to Buy Keys.

Картинка с сайта: www.productkeyslist.com

These Are Free Windows 7 Enterprise Product Keys and you can use Windows in easy Mode. Other Have also Keys Like Windows 7 Home Basic Product Key, Windows 7 Home Premium Product Key, Windows 7 Ultimate Product Key, Windows 7 Starter Product Key, and Windows 7 Professional Product Key.  People also Search on Google How To Activate Windows 7. so I will make a tutorial also then you will activate Windows 7 Enterprise Serial Key also.

Windows 7 Enterprise Product Key List

Windows 7 Enterprise License Key:

83KKC-GGDK7-39JHV-723GB-XJGFR
7RJ6P-7HM8F-B8HV8-4JDKM-JMRMF
BKWPQ-QPCC4-RXH26-BY2DJ-WQHCJ

Windows 7 Enterprise Activation Key:

C6496-2GWV6-BKQR9-XM7JW-6VCBH
BMGFV-R99Q2-X89X3-62K6X-P4DH9
BJGPX-7TGVQ-RFR9P-TT3F3-2H849

Windows 7 Enterprise Product Key:

BKTQ7-B6JY4-GT6MB-M447Q-V3DVY
BTV8X-8W4FK-6MMYH-RQ2PX-PWM87
BKYCC-38HPV-R6HJH-YJRMG-CWF8F

Windows 7 Enterprise 32 Bit Product Key:

87C7D-J2DCP-CDJ6P-CWP6K-DRP2T
BW8D2-JQ6DK-R9CP8-9X6KF-QQF3D
BPKKR-Q3B3Q-W3YQ6-9WQWP-66K7Y

Windows 7 Enterprise 64 Bit Product Key:

9FGHM-WCQBF-KTD82-8FK9B-68W8J
BWHKQ-W66QB-YCH47-XKF6F-9YDJY

Windows 7 Enterprise Serial Key:

866P6-FHX2W-W9PWG-2VR7H-6R7QF
BX6PW-9HJVX-F96YF-MMKV3-W7G2M

Related also :

• Windows 7 Activator
• Windows 8.1 Activator
• Windows 7 Pro Product Key
• Windows 10 Activator
• MS Office 2007 Product Key

Windows 7 Ultimate Retail Offline Activation Key

BR6G7-729GM-DQDQW-F9M4P-MM2JX

J6XG4-8JFTF-43CHH-8Q2VW-KHQH6

YQMCM-3W6TK-YXP66-GKCJV-PX7PH

[Tested working on 18 June 2013]

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Windows 7 Pro / Enterprise Online Activation MAK Key

YTCM9-6JWXY-XVXGW-VX8JB-2HVMJ 5862

C8R9X-8VJBW-2CWHK-DCR2V-MRV24 3703

MKKRJ-CBYG7-MK2Y4-DXHT6-8VCJB 1095

X9FM3-T6G7T-VW774-JHFBH-T2YP2 1306

FKRF7-G3Y9V-2WF2B-46VMF-DXDBR 107

2MKGR-8V87C-CQXCH-J694X-KFJH9 81

PM32W-WQ49H-Q6D2G-H8FJD-2MCMX 50

[Tested working on 18 June 2013]

Windows 7 Pro / Enterprise Offline Activation MAK Key

26FMV-TXQM6-6244R-4FVCM-YYD79

2MK2M-W7377-XKM7K-DK9PF-CRVVQ

2RKR3-4322Q-XCV4K-JGDRX-BMW4F

2TJ3R-4FXQ4-3RR9K-WG9P7-28D6W

34Y6K-MYJTV-X4X3T-WRFG6-9CFHJ

499M9-46R4P-8FYFX-9HJF6-7DDC3

49HFF-W6R76-7H4GF-464HH-K3KJX

6C33B-27X6M-HPCKP-48VBH-69RQX

6DHT8-MTM82-XMDG8-2RDKF-DQ8DK

6K3TR-MH7RK-YMGDY-RRYH7-C3VXF

77M2R-9WHXD-6XT9P-PG4TT-MDC73

7KD2C-QD92G-QYFTF-P3YQC-YP6CB

7PJDW-PVCMC-2VP43-HQ384-RKYDK

7X6JT-3FVCK-CBG9K-VQY8W-H64Y8

867PG-964FQ-JGCMD-DQXXC-VYHCH

9G4K4-RPDWT-6C7B2-XBVMG-GXDXV

BBK3Y-BJF42-749BK-QG92M-89776

BPVBF-T9MDF-FGHPB-V7V2C-VT6P3

C9B49-88XX4-W4R2K-DD6KT-WHT8M

CMT36-38CTF-2PPBK-XD2MV-M92DJ

D3QRY-CW234-KRPX9-W8XGR-R3229

D3TM4-4HYTW-68CYF-FGD8T-RMP74

D6824-HYF78-YQ7HQ-8PKPM-GWGBM

FHKXR-WCPQW-D644P-R2BJQ-6KHV7

GCY9J-Y6Q86-QM4PW-YFVMV-7XGFG

GRX77-JTGRW-H4PDF-MFKVM-CP6V6

GV443-KYXVW-B3FGM-QXXBW-XRQC6

H9JWP-8PDWX-6XDGV-YDMC4-KYB2G

HWYTW-8FPTC-8D4B2-3BXBQ-T7FHT

J3HR7-WKP8T-VP8HT-73CMG-98H4V

J6HW6-HJP8V-MJK6J-YPRDV-KPQ28

J898F-T8F6Y-2Y2DB-73WCG-CBXJT

J8BCC-HR9KY-4WWX6-BYDYC-6Y89J

KFPRR-FX6TD-C7WJM-VY8FD-46T8F

KJJ29-66Q4V-MQBB6-XGBGJ-G98GP

MJ2CV-6RB44-M28VV-YD28D-QPPYH

MKBX6-6WBDD-HD8GR-7DCJV-K6HMR

MTWVG-GV6G8-VGTY4-Q2YKW-FTQH8

MWR4V-BQ6V3-6VHHC-T9WT4-3C8TG

PQ7FT-G8RT2-T9PFG-2TDG3-BVXRR

PR9JT-V7XR7-WWQ7B-GG4DF-B4V37

PRQKM-RY64P-G4QPD-9HDV4-DKBYY

PW8JG-BGG2M-4MQ6W-R2Q7H-FDCMG

Q7WB6-VPVB7-CP4WP-MYX2P-MB2WC

RCDB3-JM4C6-X74Y9-VHHX8-8FWHB

RDWMX-CR7KW-HQHW8-4K4W8-H867Q

TJ63T-RPDB7-TDWV4-TD9HX-99T8W

TKQ3J-DV3RP-Q3H86-382RC-FRM9R

W87PW-CGD7F-6HRKP-4VHPC-VQXTJ

W8DM6-87DRW-HV7QH-8FH74-V2KP3

XHB8F-RBQCG-G6M26-DR4RK-GDW9D

YBPH4-JV7K9-M6Y7W-XRKJQ-FDHV3

YCPC3-GBYYF-7F9BQ-WV6CV-V6RF9

YFTMB-7TPBK-MJRP6-7PRWX-PK2P7

YHRFH-KC292-DRQ3P-G6C79-4CXVY

YJTT8-XRQVG-23DHV-XTJJ3-9RJB2

YRRHH-Y9GRD-2M2FH-XHDVW-QCB6T

[Tested working on 16 June 2013]

=================================================================================

All Credit To Original Keys Providers

=================================================================================

[More Info]: http://www.nsaneforums.com/topic/161210-how-to-activate-windows-7-by-phone-via-mak-retail-key/

NOTE: ***This Topic On the Forum Update Daily***

=================================================================================

Windows 7 Activate Via Phone [Permanent Activation]

Instruction

1. Disable Internet Connection

2. Go to Start Menu and right click on the Computer item. On the context menu click on Properties.

3. You can see the Windows activation status at the bottom of this screen. Click Change Product Key.

4. Next window enter your product key wait till activation Windows verified your product key…

5. On the option click show me other way to activate.

6. Click use the automated phone system

7. Dial UK number free call using skype [+448000188354] I strongly suggest use this number first

or [US Minor Outlying Island] [+18007548300]

8. You get will get Installation ID

9. Reconnect internet and open Skype dial UK Number during call you may be asked first question

are you home user or business ***[answer home user -dial1]*** Important

10. After follow the instruction and type your Installation ID after each command by the robot speaker/

11. You will be asked second question

are you home user or business ***[answer home user -dial1]*** Important

12. Finally you will be giving Confirmation ID make sure type the ID correctly into empty box then click enter and you will see activation was successfully screen..

13. You can check your activation status genuine or not command prompt (admin)

slmgr /ato

Check Activation remaine grace period:

slmgr.vbs /dlv

Check Volume activation expire

slmgr /xpr

Enjoy Your Microsoft Windows 7

=========================================================================================================

BLOCKED KEYS ***[Please don’t give me installation ID in the forum, if you have one of those keys!!]***

Q7H4R-3JP7M-RH3HG-XB23H-KGXY8

H642Y-BBPCP-C4KY8-6MQMV-WBJ93

J4QBX-B2MQ4-VHF6D-C8DJD-6WVF9

HPGBR-27QKW-XFRHV-67G3C-VJGFK

4FYYQ-TXDJ4-9K3KM-R6QJH-PV7FV

6V9KM-JBP9D-BFHXR-M89PQ-MJRYM

6QYFP-RBDF4-YC6Y3-GWCVQ-2JHB9

7TBBY-KXTVP-WBX4W-M7FPC-F47YC

HRQVP-JQDMY-YPFRB-RGB6K-R6JYY

KB342-GQH28-JK92D-3DYF3-3KVXF

GVH6C-TTR9R-BHRJW-CVGCK-CH3YF

24WX9-W99MX-DWM9C-FTYDQ-KHGBM

YMGJ9-JYMRG-M3Q2C-PTCT4-2Y63J

36D2X-KVQV2-KRBJQ-HX3YK-C4FXD

TG664-TJ7YK-2VY3K-4YFY6-BCXF4

MVG64-RQDVY-KB9RM-MX9WT-MW824

TDTY2-6HJ49-46PCK-6HY88-KQXXX

FKDJ2-RCXKD-TFW4H-2PTGK-MMMH8

H67R8-4HCH4-WGVKX-GV888-8D79B

J4M92-42VH8-M9JWJ BR7H6-KTFP6

76RJX-HDXWD-8BYQJ-GRPPQ-8PP92

P3P9R-3DH3Q-KGD38-DWRR4-RF7BC

C2236-JBPWG-TGWVG-GC2WV-D6V6Q

4HVJQ-4YW7M-QWKFX-Q3FM2-WMMHP

YH6QF-4R473-TDKKR-KD9CB-MQ6VQ

6VP2W-C8BCH-FBTQT-6CMHK-Y7QBG

WYRTJ-8KGKQ-3FDMW-2PQRX-MDYDB

MFBG6-2JM2T-VQQ6M-K86FT-P9WCW

TRV9M-9DQH8-DQVJF-DFJFQ-PV2JT

BB3K3-MMTHM-WFWJK-PCC8G-3DRGQ

J6QGR-6CFJQ-C4HKH-RJPVP-7V83X

TC48D-Y44RV-34R62-VQRK8-64VYG

CTT6T-PWYJD-327V6-W2BWW-RJ29T

After the official release of Windows 7 on October 22, 2009, people got excited to use it because it included all the features of Windows XP and Vista. People love to use it on local and commercial levels, from site navigation to performance. However, many outstanding features can only be activated with a valid license key. Here, you will get a Windows 7 product key that works on almost all Available Windows 7 versions and can be used for free.

How to Get a Free Windows 7 Product Key

There are many ways to get a Windows 7 license key, and you can also register it without a product key. You can download Windows 7 from the official Microsoft website and upgrade to the free version.

List of Windows 7 Product Keys

Here is the updated list of working product keys for Windows 7. Try these keys and save the working one for yourself, as not all keys might work for some users due to version differences.

List of Windows 7 32-bit Product Keys

List of Windows 7 64-bit Product Keys

List of Windows 7 Activation Keys

Find the Windows 7 Activation Key from the Computer

On your home screen, right-click on the “This PC” icon and go to Properties. You will see all your system specifications. Now, navigate to the “Windows Activation” tab from the left sidebar.

On the Activation Page, You will see a message showing whether your windows are Activated. If your Windows 7 is Activated, you will see your license key with the product ID. Still, if you cannot find your product key, you can check it through Product Key Finder.

Activate Windows 7 with Product Key for Free

Step 1. Go to settings or press “Windows key + I” on your keyboard.

Step 2. Click on “Properties” and navigate to the “Activation” Tab from the in bottom.

Step 3. Click on the “Change Product Key” option from the bottom

Step 4. Enter your product key, and Windows will verify it with the Internet. Then, it will activate Windows 7.

How to Activate Windows 7 without Product Key

If you don’t have a product key and you want to unlock the full functionality and layout of Windows 7. Don’t worry; just follow these steps to Activate it without a Product Key using cmd or Windows 7 Activator.

How to Buy Official Windows 7 Product Key?

To purchase the official license key of Win 7, go to “Microsoft Website” and Search “Windows 7 Buy”. Then click on “Buy” to purchase it. You can also buy this from the official Microsoft Vendors. Note: If the product key is not available in your region, you cannot purchase it.

Conclusion

It’s better to use this Edition rather than Windows XP or Vista. You can easily Activate it officially using these Product keys. The keys received an update recently in 2024 and are now functioning. If you want to Upgrade to Windows 10, you need a Windows 10 Product key to Activate full functionality and layout. If you need any assistance, just leave a comment, and I will provide a solution ASAP.

Windows 7 has made itself to be one of the most top leading and one of the most recommended versions of the windows as well. They are accompanied by some of the latest and amazing new features as compared to the previous Windows version.

Hence mentioning the Windows 7 Product key, it is known out to be the 25 characters based code that is eventually used to activate the windows straight away on the computer.

It will be making you look like as the:
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. This whole process of the Activation will enable
you to eventually verify that your won copy is not yet used away on the PC as
more than the Microsoft Software Terms allowance. 

If you already have the Windows 7 installed in your account, but you are not having the installation of the windows 7 product key, then it is impossible for you to run Windows 7 on the PC.

So, all in all, we will be mentioning the Window 7 Product key to be one of the most vital parts of the Windows for your use. 

Now right here we will be discussing some of the main
features you can have in Window 7 Product key:

• It is offering some fantastic features for entertainment.
• It can work on almost 35 different languages. 
• It is taken to the fastest OS which you can use for sharing files or printers on different networking systems. 
• It is the easiest way that will enable you to straight away jump on your running files.
• You can easily search for anything on the desktop. 
• It is entirely safe from hacking errors. 
• Easy to understand and light in weight.
• It brings you closer to the fast set of an activation without facing any bugs. 
• It has a portable activator. 
• It can help you to fix all the flaws and malware. 
• It is 100% genuine. 
• It can cooperate its working system with any version of Windows 7

System Requirements

Картинка с сайта: www.pythonblogs.com

• RAM is 1GB
• CPU is 1GHz
• HDD is 16GB
• Graphics Card is 128MB

Steps to Use Free Windows 7 Ultimate Product Key:

Before you think about using the free product key of Windows 7, it is essential to, first of all, learn about how you should be using it. These keys will not be operating if the updated feature of the windows has not been turned on.

Hence at the end of the day, the verification might fail out. 

Step 1: First of all, you have to make click on the Windows button, and then you have to open for your Control Panel.

Step 2: Now make the click on the option of System and
Security.

Step 3: Now make the click on the option of Check for
Updates.

Step 4: Now you have to click on the option of Change
Settings which is located on the left sidebar, and then you have to select
“Never check for updates” from the various other options.

How You Can Activate Windows 7 Without
Using serial key?

Having Windows 7 is taken away to be the just part of activating on Windows 7. Most of the time you are not able to acquire the working key no matter whatsoever you are doing on!

If you encounter the same issue, then you can easily activate your Windows 7 without serial or product key. Right here we have a step by step guide on it:

1. First of all, you have to make a visit to the Windows folder where you have installed your Windows 7. This can be your Drive C.
2. Now you need to look for the folder of System 32 and open it.
3. Now search for the ‘slui‘file inside this folder by making the use of search feature inside the File Manager.
4. This file will be storing all the keys of Windows 7, so it is important to delete it.
5. Make the right click on the particular file and select the option of Properties.
6. Your screen will now show you the option of settings.
7. Make the selection of the security tab as from the above and select the option of users.
8. Now you have to choose the option of the Advanced button.
9. This will make you appear with a new window for some Advanced security settings for the SLUI.
10. Now make your click on the owner table and make the selection of the user as being the owner.
11. Now click on the option “apply”.
12. Now close all remaining windows and make your way back to System 32 folder using the SLUI file.
13. You have to the right-click over the file and open the properties all over again.
14. Now make your visit to the security tab as you have done it before. Make the selection of user options and click on the edit options button.
15. Now in the front window, you can edit the permissions for the current side of users. These current users will also be acting as the system owner.
16. Now make the click on user name and look for the box which is positioned closer to full control to have access to this permission.
17. Now click on the OK option and click all the windows except the window of System 32 folder.
18. Now make the click on the SLUI file and then you have to press the Delete button which is on the keyboard for deleting the file.

Here’s a List of Windows 7 Product Keys

Windows 7 Ultimate 64 bit Product Key:

RCGX7-P3XWP-PPPCV-Q2H7C-FCGFR
49PB6-6BJ6Y-KHGCQ-7DDY6-TF7C3E
342DG-6YJR8-X92GV-V7DCV-P4K27
FUSCP-4DFJD-GJY49-VJBQ7-HYFR2
Y6C9R-C9KKG-3DJTY-Y4MPW-CR72J

Windows 7 Ultimate 32 bit Product Key:

22TJD-F8XRD6-YG69F-9M66D-PMJSM
342DG-6YJR8-X92GV-V8R4V-P6K27
EHY4Q-VB55H-XK8VD-5Y68P-RFQ43
P72CK-2Y3B8-YGHDV-293QB-QKJJM

Windows 7 Product Key 32 Bit– Updated Codes

ZPXOCI-VUBYN-MTNRB-EFHEK-SWOAA

PQL19-DN4BD-G6HIZ7-XM358-W9SKZ

MVCCV-KSKDU-ROW8R-5U42K-CVBSC

SASDS-WE235-486PU-PJLNM-GNFYR

56452-EWDSX-ZCAFQ-R1436-RYVHG

NBJRU-IYNMJ-LUOU0-794JS-VDFET

SYAUC-NVBB9-LZKAK-ISJDS-KDJDU

09MMU-8AKOO-W2IJZ-MNXHT-Y75WO

MZXNC-NVBQP-WOEIR-ITUYA-LSKDK

FJGHZ-PXOCI-VUBYN-TMEWN-ATDRR

KJHNE-RAZSEX-DFTVG-UHBJI-JNKPL

JIFTC-FSRCY-XTSRO-MIJHB-GVXFZ

DSESA-TFGYH-JIKMJ-NBHGV-CFXDZ

SWASE-DRTFG-YQ2W3-4ER56-TY78U

I9UA2-3S4D5-FG67H-8J9KM-N876V

Windows 7 Product Key 64 Bit

MLPOK-NJIUH-BVGYT-FCXDR-ESZAQ

W1Q2A-3S4F4-R5TGY-HG7UH-Y8IKJ

M9N8B-7V6C5-X4Z32-SDA4D-EF5GH

T6HJY-67JKI-U789L-KMNBV-GCFXD

SREW3-QAZXS-DWE34-MONKJ-IH789

HYGTV-FCDR5-5ZZC3-32SXD-ER435

56GTF-CVBXX-XZSDE-4MMN8-00KMJ

IUYYB-BYYYT-RCVFF-6REEW-MMKPP

LLIIU-HGGYT-TFCXX-ZMMNB-BJGGF

FRRRW-WEQAW-SEDRF-TGUHI-JBIUV

YCTXT-DRSEA-AQ989-9MKNJ-BHBGV

RCGX7-P3XWP-PPPCV-Q2H7C-FCGFR

49PB6-6BJ6Y-KHGCQ-7DDY6-TF7C3E

342DG-6YJR8-X92GV-V7DCV-P4K27

FUSCP-4DFJD-GJY49-VJBQ7-HYFR2

Y6C9R-C9KKG-3DJTY-Y4MPW-CR72J

Updated 12/19/19 – Windows 7 Serial Key

MZKAO-WQIUW-EUYRY-MBNGH-TRYER

TWEER-WQDSF-AVXVX-CMZXC-BKSAH

FKJFO-IWQYR-T9YYT-75RRT-53UY6

09OZZ-EQ128-2AFEE-18MRZ-XBVNX

VBDFG-JKSDA-HFHLK-HSAYR-OWQYR

TUIYQ-IOPUP-UQ4MK-OIJNB-HUYGV

CFTRD-XZSEW-AQAZW-SXEWD-CRFVT

GBYHN-UJMIK-PPLLM-KKIIJ-JBBHH

UUYYG-GVVCC-FFDDX-XZZAA-QQWWS

SEEDD-RRFFT-TGDDX-XCCSS-EEYYT

JJKKU-UNNVV-BBCCF-FRRTT-YYOOP

TGGHH-PLLKK-YYT56-ERT6T-CDTR2

Windows 7 Ultimate 64 Bit Product Key

22TJD-F8XRD6-YG69F-9M66D-PMJSM

342DG-6YJR8-X92GV-V8R4V-P6K27

EHY4Q-VB55H-XK8VD-5Y68P-RFQ43

P72CK-2Y3B8-YGHDV-293QB-QKJJM

Windows 7 Starter Product Key

22P26-HD8YH-RD96C-28R8J-DCT28

SK8WH-JVQDM-C9HVC-YR2XC-8M76G

2V3W2-JXTTR-28RD8-R228D-KR69C

272P4-GQ8V6-97YYM-9YTHF-DC2VP

Windows 7 Home Basic Product Key

22MFQ-HDH7V-RBV79-QMVK9-PTMXQ

239PK-QV6BM-6BX3V-KH2BD-R3VTY

2RDPF-PTCT2-DR237-KD8JY-VH2M7

2Q4QP-8P4MD-47YBP-7TXX9-FKDRM

Windows 7 Home Premium Product Keys

6RBBT-F8VPQ-QCPVQ-KHRB8-RMV82

38JTJ-VBPFW-XFQDR-PJ794-8447M

4FG99-BC3HD-73CQT-WMF7J-3Q6C9

4G3GR-J6JDJ-D96PV-T9B9D-M8X2Q

2V36J-4RK8B-GW27Q-4DXPG-RQP78

Windows 7 Family Premium 32/64 bits:

1. TJ8Y2-64HB6-TQ8H2-F2F2Q-FKXFP
2. TJ932-HK39G-7M2FK-WJJ34-QWWWV
3. TJH2C-GJ3C7-WHGG7-CFCD3-34G33
4. TJM34-QY24D-7B7FY-7YD6G-3HP88
5. TJVJ3-FPVCC-VRBCP-KPTHD-WVX7X

Windows 7 Home Premium Activation Codes

• Key: YGYFF-QJGMW-Y7YFT-64DH2-DYVFY
• Key: 2MP9Q-QTG2X-BDV64-2MFY9-7DHM8
• Key: 9HTXD-BWVFH-PP4JD-2V43X-JCPJP

Windows 7 Ultimate:

1. J7QT3-3GCPG-9GVWT-CH2XR-GMRJM

Final Verdict

So this is an end of the discussion about the Windows 7 Product Key for Windows 32/64 bit! We have even explained to you the method to use the system of Windows 7 if you are not having product keys.

Follow the steps which we mentioned right here for you and take the benefit of this system processing.