First check following things:
1. Open regedit and goto:
Code:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\
Now make sure that there is no key
Uninstall under
Policies key. If its there, delete it.
2. Now goto:
Code:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
and check whether this key contains any sub-key or not.