Some of you may find this tool useful:
http://www.sandboxie.com/
It allows to install a virtual sandbox. It can redirect the File Writing operations of any program into a sandbox folder, so you'll see if some spaceinvader.exe would try to overwrite your firewall configuration etc.
http://www.sandboxie.com/
It allows to install a virtual sandbox. It can redirect the File Writing operations of any program into a sandbox folder, so you'll see if some spaceinvader.exe would try to overwrite your firewall configuration etc.