you have spyware buddy ..this is what i found for dssagent.exe when i googled for it,
Code:
dssagent.exe is a process authored by Broderbund and is spyware. This product pops up un-solicited advertisments as well as analyses comptuer usage, which is sent back to the companies servers. This program is a registered security risk and should be removed immediately.
get ad-aware se and spy bot .. update them and do a scan on your pc to remove all infections.