PCSuite.exe 'Virus Found - Can't stop Avast Popup

Have had Avast installed for many months.

All of a sudden tonight, it pops up a “Virus Found” alert pointing to PCSuite.exe embedded in an msi installer. (Likely a very old file)(

The ‘Infection’ is: Win32:Malware-gen

Biggest problem is - Whatever I do with the Avast pop-up ‘Action to take’, the pop-up just comes straight back up after clicking OK.

Help!

start a topic in viruses and worms forum section

follow instructions and attach the requested logs http://forum.avast.com/index.php?topic=53253.0

we need Malwarebytes / OTL / aswMBR logs