Ever since the last virus I thought I had removed, my PC has been acting strange. Every time a run superantispyware it will find a critial threat, a broken file assocation. When I try to shut windowns down or restart, I get 3 not responding messages about Rundll before the computer will shut down/restart. I read a similar post on the site and downloaded HJT and here is the log I got.
Logfile of Trend Micro HijackThis v2.0.4 Scan saved at 2:53:24 PM, on 3/25/2012 Platform: Windows XP SP3 (WinNT 5.01.2600) MSIE: Internet Explorer v8.00 (8.00.6001.18702) Boot mode: Normal
Rundll is not a process from windows. However rundll32.exe is a process from windows, and should be safe. As some viruses use a similar name to "Rundll32.exe", Rundll.exe is probably virus-related.
You could try to open up taskmanager. CTRL + SHIFT + ESC
And go to the "processes" tab. If you see 'Rundll.exe' right-click it and select "End process". As Rundll32.exe doesn't need to be running, probably rundll.exe doesn't either. If you see both running, or more than one process with similar name, I guess you haven't completely removed the virus.
Rundll32.exe is turned on automatically whenever you play a game or execute a program. Therefore, this doesn't have to be executing.