Hi,

i did as you said and i run a new scan now but the file is still in virus chest (should be there?)
As it says this is virus chest. You don't have to worry about, nothing can escape from there. Or...you can empty virus chest if you will.
Also do u know what could be that file ?
Nothing, location points to system [b]%temp%[/b] folder where various program place its temporary files during installation or some running. As there are malware that know to use %temp% as loading point avast know to flag this junk files. TFC cleans all temp files.
Can you please help me again ?
Of course, but I think you're not infected. If you wish check, run this:

Please download Farbar Recovery Scan Tool (
http://www.mcshield.net/personal/magna86/Images/FRST_canned.png
) by Farbar and save it to your desktop.

Note: You need to run the version compatibale with your system. If you are not sure which version applies to your system download both of them and try to run them.
Only one of them will run on your system, that will be the right version.

[*]Double-click to run it. When the tool opens click Yes to disclaimer.
[*]Press Scan button.
[*]It will make a log (FRST.txt) in the same directory the tool is run. Please attach it to your reply.
[*]The first time the tool is run, it makes also another log (Addition.txt). Please attach it to your reply.

Next…

Please download GMER, the RootKit Detector tool from the link below and save it to your Desktop:

Gmer download link
Note: file will be random named

Double-clicking to run GMER.

[*]Wait for initial scan to finish - if there is any query, click No;
[*]Click [ Scan ] button and wait until the full scan is complete;
[*]Click [ Save … ]- save the report to the Desktop (named ARK );

[*]Then click the >>> button and select Autostart card;
[*]Click [ Scan ] button;
[*] After quick scan, click Copy button;
[*]Open notepad and Paste text. Save report to the Desktop (named autostart )

Attach here both Gmer logreports. (ARK.txt and autostart.txt)