In this case no real damage done but it is a bad habit to get into.
This is caused because you have at come time dome a Panda
spit on-line scan. Apart from the fact that it dumps all this cr*p in a sub-folder of the system32 folder, it doesn't encrypt its signatures, so your resident AV, in this case avast, detects the signature. After all this is what an AV does look for matching virus signatures.
You should remove this Panda activescan junk from the system32 folder, I'm not sure if there is a add remove entry for panda/activescan in the usual windows add remove programs area.
If not I don't know if this will do the job - Panda removal tool:
http://www.pandasoftware.com/resources/sop/UNINST_v1012.exe.
Here is a link for other On-line Virus Scanners and other useful Links
Security-Ops.eu.tt that don't seem to cause this grief.