hi,
have you scanned n safe mode?
apply Microsoft patches as well.
You may try these steps
1. Click Start > Run and type REGEDIT
2. browse to the path HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced
On the right side, double click the
hidden value and give it a value of 1.
Let us know if it works
Cheers
Pete