Prowin32 Errors

What do prowin32.exe errors mean when users are attempting to log
into Vantage (5.034)?
Just went live with 5.2 over the last weekend. Had several problems,
but the worst is a Prowin32 Error. I've attributed this in the past
to virus software, but this is not the csae this time. Seems to
happen most when in Job Tracker.

Has anyone had the same issue? This did not happen in 5.1. Our
client operating systems are all 98se with ie6.

Thanks

Mike Gilchrist