How often do you scan for these?

Weekly For my computer, usually Monday nights (This is a time when I watch tv so I'm not using the computer.)

I set my brother's to run scans at the same time/frequency (Since we're both watchin the same thing.)

For the desktop computer (that the rest of the family uses) antivirus scans are run every week but which day of the week is hard to determine, because it depends on what is going on... If the comp is just sitting no ones using it, then I'll run a scan.

Of course if I suspect something is up, I'll run additional scans.

Every week on Friday, I scan for Spyware and Adware.

Every Saturday, I scan for viruses, and it goes all the way through Monday.

At least once a month, I scan, and clean my registry, and check windows for errors..