Virustotal.com seemed to find something.
A small sample of the results:
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a-squared_____4.5.0.50_____2010.01.22___Virus.MSWord.Ded.A!IK
AhnLab-V3_____5.0.0.2______2010.01.22___-
AntiVir_______7.9.1.146____2010.01.21___W97M/Ded.A
Antiy-AVL_____2.0.3.7______2010.01.21___-
Authentium____5.2.0.5______2010.01.22___W97M/Ded.A
Avast_________4.8.1351.0___2010.01.22___MW97:Ded family
AVG___________9.0.0.730____2010.01.21___W97M/Ded
BitDefender___7.2__________2010.01.22___W97M.Ded.K
CAT-QuickHeal_10.00________2010.01.22___W97M.Ded
ClamAV________0.94.1_______2010.01.22___W97M.Ded.F
Comodo________3664_________2010.01.22___-
DrWeb_________5.0.1.12222__2010.01.22___modification of W97M.Thus
eSafe_________7.0.17.0_____2010.01.21___O97M.GNcc
eTrust-Vet____35.2.7251____2010.01.21___Ded.A
etc.
Additional information
File size: 641536 bytes
MD5...: 4423437f7ce1e0e82136eab96dfb5eec
SHA1..: c05265b92e54b2a3276e61d3869f9061cf71967b
SHA256: 11d6da9c919637abc8ff80013c64221c1dd38767a1e3416378374da5eec60ed9
ssdeep: 12288:/d2h4v3Y7aZFhFJbCGjMi6+9D0IFjoJgA2OOraXNuYMXJVTiPeAFiFyrfY
rUG:cWB/rjMi1QejKdjMziPe7FCG
PEiD..: -
PEInfo: -
RDS...: NSRL Reference Data Set
etc.
trid..: Microsoft Word document (80.0%)
Generic OLE2 / Multistream Compound File (20.0%)
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The odd thing is that I made a new document - a single line of text, and tried it again, and the results were negative. No problems found.
Could a single document have a virus and if deleted and simply recreated, perhaps, solve the problem?
Again, any suggestions would be appreciated. If I need to get anti-virus software, I'll do it, but would like to get some thoughts on why one document would be infected and not another.