I had a problem with this before, it killed my excel on MS Office 2007. I experienced it again yesterday, I am running 10 machines, I am running Windows base and Linux base machines.
I have found that it only happens with the Clamwin version which I updated to ClamAV 0.95.3. As stated I also run (prefer) Linux machines, I have copied the suspect files to an external storage device,
and scanned these files using the built-in antivirus (ClamAV Linux version) to scan the storage drive and it found nothing. None of the files identified by the Windows version were seen as a threat by the Linux versions. I hope this will help in the attempt to corrent this issue. P.S. these files are still showing up as threats.
C:\Program Files\Microsoft Office\Office12\EXCEL.EXE: W32.Virut.Gen.D-163 FOUND
C:\Program Files\Microsoft Office\Office12\excelcnv.exe: W32.Virut.Gen.D-163 FOUND
C:\Windows\Installer\1495bd.msp: W32.Virut.Gen.D-163 FOUND
C:\Windows\Installer\1495d5.msp: W32.Virut.Gen.D-163 FOUND
C:\Windows\SoftwareDistribution\Download\d16f45aa864340ccf36504588c6fae4b\excel.cab: W32.Virut.Gen.D-163 FOUND
C:\Windows\SoftwareDistribution\Download\d16f45aa864340ccf36504588c6fae4b\excel.cab: moved to 'C:\ProgramData\.clamwin\quarantine\excel.cab.infected'
C:\Windows\SoftwareDistribution\Download\daa4e3a0ea4e94aba329bc28d3b354b1\xlconv.cab: W32.Virut.Gen.D-163 FOUND
C:\Windows\SoftwareDistribution\Download\daa4e3a0ea4e94aba329bc28d3b354b1\xlconv.cab: moved to 'C:\ProgramData\.clamwin\quarantine\xlconv.cab.infected'
