5. smss.exe trojan Virus :

Some of the problems caused by this virus are :

1. Show Hidden Files and Folders not working.
2. My Computer Drives open another explorer window.
3. When you run a program, just in 2 or 3 minutes the program dissappears
(Actually runs in background but you can not see its window in foreground).
Solution:

http://www.webroot.com/consumer/downloads/ and click on, Spy Sweeper with AntiVirus NEW VERSION

download this file and run to remove the virus.