Microsoft is distributing Windows 7 product keys to all those people who have downloaded Windows 7 release candidate. You need to have a windows product key to activate your version of Windows 7. Microsoft is having a set of 15 product keys and distributing keys from those 15 numbers only. Just to prevent unauthorized usages and illegal distributions, Microsoft is taking this OD release seriously and hence, started the 15 Product keys activation system.
At first get a copy of Windows 7 RC. You can download Windows 7 RC from Microsoft’s official site and get it installed. During installation it will ask you to enter it’s activation key number. Put any of the following activation key numbers and complete your Windows 7 RC installation process.
Free Windows 7 RC Activation Keys
MM7DF-G8XWM-J2VRG-4M3C4-GR27X
KGMPT-GQ6XF-DM3VM-HW6PR-DX9G8
MVBCQ-B3VPW-CT369-VM9TB-YFGBP
KBHBX-GP9P3-KH4H4-HKJP4-9VYKQ
BCGX7-P3XWP-PPPCV-Q2H7C-FCGFR
RGQ3V-MCMTC-6HP8R-98CDK-VP3FM
Q3VMJ-TMJ3M-99RF9-CVPJ3-Q7VF3
6JQ32-Y9CGY-3Y986-HDQKT-BPFPG
P72QK-2Y3B8-YDHDV-29DQB-QKWWM
6F4BB-YCB3T-WK763-3P6YJ-BVH24
9JBBV-7Q7P7-CTDB7-KYBKG-X8HHC
C43GM-DWWV8-V6MGY-G834Y-Y8QH3
GPRG6-H3WBB-WJK6G-XX2C7-QGWQ9
MT39G-9HYXX-J3V3Q-RPXJB-RQ6D7
MVYTY-QP8R7-6G6WG-87MGT-CRH2P
These keys are valid for both 32 bit and 64 bit Windows 7 RC.
The easiest way to activate Windows XP With a single file and a single click. Worked for everyone that's used it so far. Message me if you have any problems, 
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Windows Genuine Advantage Validation Pack For Windows XP
This App enables you to Activate and Validate Windows XP they are as follows:
Windows XP Black Edition
Windows XP Media Center
Windows XP Pro
Crystle XP
Windows XP SP 2
Windows XP SP 3
