Having a strange problem! Is it a virus or trojan?

[ajayritik]

I have recently got an error message which comes whenever I open a webpage. It looks like a virus or a trojan. I get following alert from Norton Antivirus whenever I open a webpage:
Object Name C:\WINDOWS\TEMP\sos.tmp
Virus Name: Downloader

It happens with all browsers infact when I open it with Internet Explorer the Virus Name is given as Trojan unlike in Mozilla or Opera which just gives Virus Name as downloader. What could be the problem?

[anandk]

use ccleaner to clear temp files and other junk.

if problem persists and ur norton is unable to remove yr infection, maybe u may want to change yr av / protection !

[ajayritik]

Hey I changed the AV to NOD 32 but surprisingly after I ran a scan it gave me no virus alerts. Does this mean that NOD32 is not as good as Norton?

[ajayritik]

I'm facing a strange problem after I removed Norton and installed NOD32 things were working fine but I observed yesterday that when I was running Nero Vision all of a sudden the window disappeared however I see the process running in Windows Task Manager. I tried my best to get that application but I wasnt able to access it. I also get Internet Explorer script error now often. What could be the problem?