Znalazłem przed chwilą na jakimś serwisie:
If you have done so, after installing update KB940510 and BEFORE restarting the computer, check if the KB940510 is installed or not from Install Updates list or search for all “wgaer_m*” files using Advanced Search. Make sure that you select all local drives or everywhere as searched location, and check the option to include non-indexed, hidden, and system files. You will likely see one or two files starting with wgaer_m. Delete all files found and then restart the computer. All detection will be done, and Vista will be working as normal.
Edit by Mike013
Jeżeli cytujesz jakiś tekst, to podaj jego źródło 
sie robi:
http://www.rlslog.net/vista-sp1-available-through-automatic-update/
. . .