Very funny… ;D ;D
Although this advice works and it's good, I myself do not do it... the antivirus is always on regardless of anything running concurrent. I never have a conflict with other program detects on demand an infection (or a false positive).
Of course, it demands more resources and it's slower.
I'll second Tech's method. This gives me a chance to do 2 scans at the same time. Usually while I'm doing non computer activities. (If there is such a thing. ;D)