Not without leaving you open to any infections.
Basically these things shouldn't occur if Windows is kept totally up to date with both critical and non-critical updates plus you keep software, driver etc. up to date, expecially Java, Flash and suchlike.
It helps too to have some extra anti-spyware tools handy:
http://community.mcafee.com/showthread.php?t=136913 I'm no expert in this field however, so hopefully someone else will spot this and throw their views in.
Did you do the scans mentioned in that post?