How to fix a Windows 7 (64 bits) gone completely crazy?

[marcoromeo]

Hi all,

I have a pc with Windows7 64 bits since 1 year and half but today it has gone completely crazy.

This morning I turned on the computer and the following things happened:
1- impossible to open programs from the desktop (neither through double-click or rightclick->open)
2- impossible to open applications from the list of recent applications in the Start Menu
3- no applications in the Start Menu (blank list)
4- "my computer" is now called "my computer(32 bits)" as many other things (i.e. recycle bin became "recycle bin (32bits)")
5- can't access the control panel, system settings and all other managers from icons (only from command line)
6- in the task manager, everything that is working have a "*32" label (which wasn't happening previously). Even though, I can run 64bit programs if I open them directly from the program files folder
7- no system recovery point available


A quick search for viruses gave negative, microsoft fix hasn't detected anything wrong and creating a new user hasn't solved the issue.

Now making an extensive virus scan (will take forever) but any help or idea would be much appreciated.

Thanks.

 

[marcoromeo]

Update...
The issue is getting worst and worst, while the antivirus is still not finding any virus.
Basically I discovered that many managing windows can't be opened even through commandline... I can't access the control panel, the application manager (for un-installing software) or the main screen of the system properties (to check the system summary).

Weird!

 

[marcoromeo]

The extensive virus scan is now completed and is negative.
I understood that my problem could be related with wrong assignment for shortcut links. I tried to fix the register following various tutorials and guides but it was all useless.

Still need your help :s