Suspicious File Using Heuristic Method. Help :(

Hey, I’m having a small problem with my secondary computer running Windows Xp 32bit with Service pack 3.
Avast! 5 Internet Security.

The problem is that a suspicious file has been found… not scanning, just found it randomly… I have had this computer for about a month its a used computer, when I first got it i did a MBAM And Avast scan both running clean.
The suspicious file was found us a heuristic method. The name and file location is

C:\Documents and Settings\USER\Local Settings\Temporary Internet Files\Content IE5\logger[3]htm.

Reason I need help is because I have never had it come up like this. Its asking me to send this information to avast and simply delete the file. On a previous post I was notified that method being used is used to identify rootkits,

EDIT: OK I have deleted the file as Avast recommended. Being the file was in a temp folder, I have run ccleaner.
Does this mean I’m safe? Is there any other procedures I can take to make sure that was indded the only file.

This is a strange file to be detected by what is in effect the anti-rootkit scan, That is the only one that has that wording.
“A suspicious file has been detected (using a heuristic method). This may be a sign of malware infection. Please allow the file to be submitted to our virus lab for analysis.”

As I said strange as I wouldn’t have thought a simple .htm file could be active like this. However, given that it is located in the Temporary Internet Files folder, a temporary location I would a) clear all Temporary Internet Files in your browser settings, or b) use CCleaner - Temp File Cleaner, etc. to clear all temp files.

Should it resist these clearing methods try using TFC - Temp File Cleaner by OldTimer
http://www.geekstogo.com/forum/files/file/187-tfc-temp-file-cleaner-by-oldtimer/
TFC requires a reboot immediately after running. Be sure to save any unsaved work before running TFC.

Obviously you could also let avast delete it in the next scan if it is still there.

CCleaner has been run, clearing near 13 gigabytes of temporary files.
The folder where the file was doesn’t exist anymore. I never felt it to be acting strange so I can’t really say whether damage is done or not

I would suggest that you reboot and the avast anti-rootkit scan that detected this will run again about 8 minutes after boot. This if nothing else should confirm it is gone.