By Pass Windows Genuine Validation Process.

1 : Include All Updates
2 : You Will Get A message You May Be Victim Of Software Counterfetting
or Piracy .
3 : Go to Task Manager and ENd the Process WgaTray.exe
3 : go to System32 folder there locate.

WgaLogon.dll
WgaTray.exe
LegitCheckControl.dll

5 : Delete all the above files ; If you are unable to delete them just
rename and delete .
6 : Now go to x:\Documents and Settings\All Users\Application
Data\Windows Genuine Advantage\data folder
7 : delete the file data.dat
8 : Open Note Pad Write Anything You Want To Write Just Write Now Save
it as data.dat in the x:\Documents and Settings\All Users\Application
Data\Windows Genuine Advantage\data folder
9 : Set The Arrtibute Of File As Read Only and Hidden .
10: Restart the PC.

Your Probelm Is Solved just download any thing from MS.