Problem file won't delete and is affecting the performance of my pc

I have a problem with an .avi file, I think it may have a virus. Here
goes...

It was downloaded from an unknow site. While kept in a folder (A) within 'My
Documents' folder it greatly slowed any operations whenever I opened folder
A to view its contents.

This .avi file will not delete and can't be moved, comes up with a message -
"Cannot delete '.avi file': It is being used by another person or program.
Close any programs that might be using the file and try again." This message
comes up even when no programs are opened, its a stand alone home pc so no
other users.

I stupidly copied (it copies OK) it onto my Desktop. Now it slows the
computer down all the time where it used to only slow the computer when I
opened the folder that contained the .avi file. What I've done is created a
duplicate of a problem. Its now in two locations and I can't delete it from
either the folder or the Desktop.

Please help/advice to permanently delete this .avi file.

Thanks!

p.s. what could be causing this problem?

 

Try deleting it in Safe Mode.

If that fails, try Gipo@MoveOnBoot. (Freeware)

I strongly urge you to pay a visit to the Spyware Forum section and follow their recommendations to rule out infection and make sure you are protected.

 

Thanks for the reply Insomniac.

I had a look at Spyware Doctor. It looks like the way to go.

Do you know if this can be used with Norton AntiVirus? That's what I already have on the PC.

 

also a tool that is usefull for deleting things is http://majorgeeks.com/download.php?det=4709

 

Yes you can.