Maybe you should look into sandboxie.
Its a sandbox program (if the name didn't give it away).
Basically its a Virtual Machine that protects your computer. I use it on my internet browsers. I also set it to delete box on close.
Its a solid program and will protect you from all forms of virus, malware, and drive by downloads. As well as day 1 exploits and fflash/java vulnerabilitys.
They had a man test a new system. Installed it and downloaded 200 known viruses, and malware. Installed them all then closed the sandbox.
Scanned the system with 3-4 different (very popular) anti viruses. Not one of the AV found anything.
They offer a free version and a paid version.
Might want to look into it.
Could save you from future frustration.