want to change from evaluation copy to RCA.please help

hey guys.i have evaluation copy of windows 7 version 6.1(built 7100) which will expire next year in march.i have question now,if i buy the RCA version from retail and just install it over my current evaluation copy would i be able to keep all my programs and use them ?basically just want to know if i can install RCA and have no expiry date of course and use the programs that i installed in evaluation copy?and if i can please tell me how to do?thanks
sorry to confuse

you cannot do an in-place upgrade to the final version without some tricks (you would have to extract the DVD or ISO, edit file, reburn or run setup and upgrade).

Run the Easy Transfer Wizard and then clean install is probably a better option for a cleaner, more stable and responsive system.

thanks for the help but as you notice im not a professional in pc stuff so can you give me more detail how to do it?thanks ps.im upgrading from evaluation to RTM.the final retail release..

What part do you need help with? Did you read the post I linked to?

well i have the final windows 7 with me now so tel me how to install it so i can keep my programs and stuff coz i have lot of games and i lost some of the cds and cant install them again..thanks alot

1) Back up your important data (at a minimum use the Easy Transfer Wizard)
2) Copy the files off of the Windows 7 DVD to a folder on your hard drive
3) Go to the sources folder (the one that was copied onto your hard drive)
4) Open the cversion.ini with Notepad and edit/save the fields as shown in the post above
5) Run setup.exe from the folder on your hard drive (not the DVD)
6) Upgrade

Be prepared to wait a long long time for it to finish.

sweet thnx alot man i got it :)

You're welcome. Good luck. :)

just for make sure so with this way i would be able use my games and programs after installation and i would never have expiry day rite?

Yes if everything goes well. However be aware that this method is unofficial and unsupported by Microsoft. They have disabled upgrading from RC to RTM and they recommend doing a clean install.