Invalid CD KEY fix

this was taken from planetbattlefield afetr i developed a problem where my BF2 keey tell me my cd key wasn't vaild

SOLUTION:

1. Start the patch (no this is not a reinstall - keep reading)
2. Select your language
3. At the "welcome-screen", do not proceed!.
4. Keep the patch-window open and go to your start menu, select "run".
5. Write %temp%
6. Enter the folder {alot-of-digits-and-letters} and proceed to a a folder with a similar name. For example:
{03A9E526-2B99-4AF2-BC50-D26A2CFB516D}\{F317E784-F31C-4F26-A610-2D7BD89FEC5F},
7. Double click BF2CDKeyCheck.exe
8. You won't notice anything at this point.
9. Now your CD-KEY troubles are over (worked for me).
10. Thanx to PlanetBattlefield Forum members

THIS solution made things ok for me!