Find out if your windows uses a valid product key

Microsoft introduced Windows Genuine Advantage (WGA) just a month ago to Windows XP users. Once installed it checks if the running Windows XP version is genuine. If it´s not the it´s showing annonying popup messages. It´s Microsofts decision that only popups are showing, they could easily change this to force a purchase for example at a later point.

WGA is installed using Windows Updates, it copies three files on your system.

\WINDOWS\system32\WgaLogon.dll
\WINDOWS\system32\WgaTray.exe
\WINDOWS\system32\LegitCheckControl.dll

There are reports on the internet that sometimes legit versions of windows xp recieve those popup messages. Microsoft released a program that checks wether your windows xp key is legit or not. You can download the Microsoft Diagnostic Tool from the microsoft homepage.

If you key is not valid you have the following options to fix the problem asap. (Besides calling Microsoft asking what´s wrong of course.):

Option 1. 

Option 2. 

Clear the file C:\Documents and Settings\All Users\Application Data\Windows Genuine Advantage\data from all data and make it read only. Restart Your Computer.

Option 3.

If you have another windows xp key (maybe because if your complaint to Microsoft or the retailer that sold you the operating system) you can change the key by using Microsofts Key Update Tool.

Option 4.

There are ways to uninstall the wga files. This is only a temporary solution, next time you run windows update it´s likely to be installed again. (source)
1. run > regedit, search and delete all references to WgaTray.exe

2. start in safemode and remove the infection by deleting the file WgaTray.exe in c:\Windows\System32, placed there by the second greediest Corporatin in the World (Intel honlds the enviable no1 spot). (B. Gates III is best known for spying on his customers.)

3. restart your computer