Hello Shassouneh
I'm having a similar problem on my Mom's computer. My problem may be related more toward the "Reregistering Jscript.dll and Vbscript.dll" that was mentioned in earlier posts. Unfortunatly, I am not in front of that computer at the moment to try any of the fixes suggested. I will try them as soon as I can and relay any success I have.
The reason for the post though was to tell you how I got to this point. Maybe you'll find the info useful, (Or give me some useful info back!)
I contracted a adware infection (they should be called viruses) called SpySheriff thanks to some vunerabilty in the Picture/Fax Viewer. I used System Restore successfully to roll back a couple of days so I know at this point it was working. But the infection was still there. I ran Ad-Aware, Spy-Bot, and Microsoft's Anti-Spyware Beta and somewhere managed to get rid of the SpySheriff.
At this point, I think it still has an adware called NOTN or something like that. Causes groups of pop-ups every couple of minutes. I tried to run the adware sweepers again, in and out of safe-mode but the problem is still there. (I found a temp fix is to end the Process WTTA.EXE)
I for some stupid reason (cause I'm a cheap you know what) I TRIED to install "Norton Antivirus 6" somthing from their website. The installtion failed about half way through. This is were things got really BAD! Upon rebooting, almost all of the icons on the desktop were the generic unassociated icon (you know the one) and nothing would run. I would get a error stating the file needed to be associated with a program. Here is where the blank SysRestore window started.
After a couple of days of trying to fix it myself, then later trying email support from Norton (which proved unless) I broke down and called Norton Tech Support. The tech had me adjust my permissions in the "HKEY_CLASSES_ROOT". This is where I noticed there is no "Administrator(s)" account in the root permissions window. Only Everyone, SYSTEM, and a named user account. This didn't seem to bother the tech. He had me adjust Everyone, and SYSTEM permissions to "FULL CONTROL" and under advanced to "Inherit from Parents...". This cleared up the association problem. But when I tried to use SysRestore, I got a blank window. When I tried Search Files/Folders, The window was blank except for the little dog at the bottom. I also cannot install Flash and there are a handful of other things that are happening.
Hope the above can be of some use to you. (Sorry for the long-winded-ness!)