What do you mean not the one avast found ?
If you refer the the secondary part of the name, e.g. [susp] then that isn't unusual as malware names differ from one AV to another, there is no standard naming convention.
So I believe the detection by avast [susp] suspicious, means it is suspected to be of the wma:wimad family rather than a specific variant signature.
Only true virus infection can be repaired, e.g. when a virus infects a file it adds a small part to it, provided that file is one that avast has a repair routine for, then it may be possible to repair the file to its uninfected state.
However, for the most part so called viruses, trojans (adware/spyware/malware, etc.) can't be repaired because the complete content of the file is malicious.
So generally the wma:wimad family are trojan downloaders - which is a detection for malicious Windows media files that are used in order to encourage users to download and execute arbitrary files on an affected machine. When opened with Windows Media Player, these malicious files open a particular URL in a web browser. That location may be setup to download more malware.
There is no rush to delete anything from the chest, a protected area where it can do no harm. Anything that you send to the chest you should leave there for a few weeks. If after that time you have suffered no adverse effects from moving these to the chest, scan them again (inside the chest) and if they are still detected as viruses, delete them.
