Hey!
Turns out now avast is “detecting” the trojan remover updater program as a virus!!!
According to avast, trupd.exe is infected with win32:malware-gen.
This, added to the incredibly annoying autosandbox are starting to really annoy me…
Send file to Avast lab via Avast chest. 
There are versions that are digitally signed, and there is a version that is not. The trupd.exe file should be in the C:\Windows\System32 folder.
Can you give the download source link with hxtp. Did you check here: http://www.backgroundtask.eu/
polonus
And also…replace trojan remover with malwarebytes
Prevx.com says it is malicious software
A security application vs. security application FP is not HUGE, it is par for the course. Especially when dealing with less-known software like this. HUGE false positives are ones on System files.
Sometimes I think Prevx thinks everything is malicious.
Yes, I have found that Prevex frequently finds even the most benign thing malicious. No wonder they push out wildly inflated stats that they detect thousands of things that other AVs don’t.
I don’t anything about thousands.
It is a second opinion. Another site says that Trupd.exe is not malware.
Thanks for the heads up on Prevx I have never used it and for sure will not now ever use it. ;D
I am sure the geeks in the avast! lab can figure it out and if it is a FP they can email Prevx some sarcastic message. 
The file reported by Prevx and the one the OP have problems with is not necessary the same file just bc they have the same name
So the file should have been uploaded to virustotal and checked
Without a scanning report on what was flagged there we cannot say anything conclusively. It is dependant also where that executable was located as I wrote above found in C:\Windows\System32 folder means benign,
polonus
It IS a huge FP, becasue it prevents updating trojan remover. Avast is supposed to HELP in virus removal, not interfere with it.
The file trupd.exe is and has ALWAYS been located in the program’s installation folder, NEVER in c:\windows\system32.
Oh, and BTW, just because some viruses have used the name trupd.exe in the past,it doesn’t mean that the LEGITIMATE updater for TR is a virus…You REALLY just CAN NOT rely on that prevx site…
BTW, I downloaded the TR installer from their servers (simplysup).
BTW 2: The file IS digitally signed by simply sup software, still avast insists it’s a virus.
According to virustotal, avast and Gdata flag it as 'malware-gen" and ClamAV complains just because it’s aspacked…
You have reported this, yes?
No need to. It’s fixed now.