[Clown]

Если читаешь по английски:

How can I remove the "For testing purposes only..." message from my desktop? Information: After installing Windows Media Player 9 Beta you might get a message saying "For testing purposes only. Build...." on your desktop. To remove this message do the following: Start Registry Editor (Regedit.exe). Locate the following key in the registry: HKLM\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates Delete the key called 2BD63D28D7BCD0E251195AEB519243C13142EBC3 Locate the following key in the registry: HKLM\SOFTWARE\Microsoft\SystemCertificates\CA\Certificates Delete the key called FEE449EE0E3965A5246F000E87FDE2A065FD89D4 Close the registry editor. Reboot. Note: Windows Media Player v9 is now Gold, meaning you do NOT have to use the Beta version (who used it anyway?). See the Download Windows Media Player 9 page on my site.