be careful about exes, they might be viruses even if your virus scanner doesnt say it is. most scanners are signature-based, which means the company has to get a sample of the virus to figure out how to handle it. they release the update and the scanner works.
however, its easy to compress an exe or change it to defeat the anti-virus signature.
please use the online service at
http://housecall.trendmicro.com to scan your system for free.