when in doubt, play safe.
a dot.exe file can possibly be associated with AdWare.180Solutions
run a good anivirus like bitdefender, avg, kaspersky or avast.
run a couple of good anti-spywares like microsofts', adaware, spyware doctor or spybot.
run ace utilities or tune-up utilities or ccleaner to clean up your junk files and registry entries.
should take of your problem hopefully !
have a nice day !