Antivrus in the background or on demand?

[jimsteranko]

I use Photoshop (CS4) quite a bit and have noticed recently a lot of "not responding" events. I've installed quite a few malware, etc. programs and most seem to want to run in the background. I've now disabled all these but am worried about not having an antivirus prog running constantly. Necessary or not?

Your thoughts? - give them to me.

 

[jimsteranko]

I was using Norton 360 v2 but the uprade price was about £10 or more over just nipping into town and buying the newer version from a store with a name reminiscent of Ulysses' dog.

Currently using Avira.

No Star Trek: The Motion Picture fans here? Thought someone would have caught it?