When I try and right click a file instead of opening the "right click menu" it try's to start installing a program (Scan Soft)and FINALLY after I cancel enough times the right click menu appears..
What is killing me ?
I also have most of the "Security" download sites (MS, McAfee, etc) blocked even if Host's has no problem
Scan Soft is a scanner software, have you installed it recently ?
If not it is a virus, you can run McAfee Avert Stinger (standalone), but suggested to run malware scanner like MBAM or AVG10.
Make sure no such application is loading on startup, Start-Run type MSCONFIG, check startup and services, do not change services unless specified app. is there.
If you have ccleaner, lookup what it shows in startup under tools.