used the ol bat file n "for testing purposes" was gone.
if u ran this file on n ol sp1 build,
it will tell ya that there is no such file.
no worry just reboot n its gone.

[hide]@echo off
echo Remove sp1 build no from desktop (xpsp1) by wet paper bag (and bophoe)
echo.
echo this will remove "Testing purposes only" and build no from your desktop
pause
echo.
reg delete HKLM\SOFTWARE\Microsoft\SystemCertificates\CA\Cert ificates\FEE449EE0E3965A5246F000E87FDE2A065FD89D4 /f
reg delete HKLM\SOFTWARE\Microsoft\SystemCertificates\ROOT\Ce rtificates\2BD63D28D7BCD0E251195AEB519243C13142EBC 3 /f
echo.
echo all done, reboot for changes to take effect
pause[/hide]

thanks keru

Just installed 1090 and so far so go.......