Hi,
Copy the below to a .reg file and merge it to your registry...
REGEDIT4
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Media Center\Service\EPG]
"TOSAgreed"=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Media Center\Settings\ProgramGuide]
"fAgreeTOS"=dword:00000001
"fAgreeEPGPrivacy"=dword:00000001
"fGetEpgData"=dword:00000001
"fEpgDataAvailable"=dword:00000001
"fUsageTracking"=dword:00000000
This should enbale the guide in the menu again.
Hope it helps!