problem when start windows

when first start windows i get a message bock that says
WINDOWScannot find “C:\PROGRA~1\SOFTWA~1\soproc,exe”
make sure you typed the name correctly an then try again.to search for file,clickthe start button and then click search.
when i click ok i get a "dramatic"sound.
i have not searched for or entered this program, i have tried to clear with program restore but cannot restore to a date prior to when this first started. i have run avast scans and even deleted the avast program i had and then downloaded a new clean version but problem still exhists
any advise?

A google search for soproc.exe returns many hits http://www.google.co.uk/search?q=soproc.exe mostly referring to an advertising program, this is just one of them http://www.processlibrary.com/directory/files/soproc/.

A removal link, http://www.bullguard.com/forum/10/Remove-soprocexe_22839.html