HI jerome,
If you could provide the following logs and file from the infected computer, we could give you a solution for the mentioned viruses.
mwav.log ->[from the %temp% folder or %ProgramFiles%/Escan/mwav.log]
mwavc.log ->[from the %temp% folder or %ProgramFiles%/Escan/mwavc.log]
pinfect.zip -> [from %temp% folder or %ProgramFiles/Escan/Infected/pinfect.zip]