Double-clicking any drive opens search option:

Solution 1:
That's a virus named as ravmon.exe and autorun.inf
Scan first with a good antivirus [Nod32 Recommanded]
then try this trick.

First show the hidden files and folders options then try this method

1. Go to Start-->run and type cmd then click ok

2. If u want to remove the infected file from c drive then type C: in command prompt and press enter

3. Type autorun.inf and press enter
autorun.inf file is opened

4. Now type "attrib autorun.inf -s -h -r" and press enter

5. Now delete the file by typing
"del autorun.inf" and press enter

6.Now type autorun.inf and press enter now, u will find no infected autorun.inf file.

7. same way do for all other drives then restart ur pc


3. I accidentally deleted my "mspaint.exe"/"notepad.exe"/etc. file, how can I get it back?


Solution::

You can use any of following methods:

A. Goto "%windir%\System32\DLLCache" folder and look for the file, if its there then copy it to "%windir%\System32\" folder.

B. Insert your Windows Setup CD and goto "I386" folder. Now look for the same file, it'll present there but the last letter of extension will be "_". e.g., u'll get "mspaint.ex_"/"notepad.ex_"/etc. Now open Command Prompt and goto "I386" folder and give following command:

expand mspaint.ex_ mspaint.exe
expand notepad.ex_ notepad.exe
etc.

Now u can copy the file to "%windir%\System32" folder.

C. Give following command in Command Prompt:

sfc /SCANNOW

It'll automatically restore the files.