But, of course, you must be a little bit paranoid to do a daily full scan with 3 programs. It won't harm at all to skip it one day.
For the last few years when it came time to scan my computer with my AV, SuperAntiSpyware, Malwarebytes, etc. I would finish surfing the web, then before I started a scan I would check for updates on my software before I scanned my computer. I usually set my computer to scan at bedtime. The weather has been bad here tonight, lots of thunder has kept me from sleeping, no lightning otherwise I would not be on this computer right now so I wanted to know if I could scan my computer with my Avast, or my SuperAntispyware or my Malwarebytes software and continue surfing the web while I scanned? You can only scan with one security software at a time, correct? You can't scan your computer using all 3 at the same time can you?