Anti-virus: free AVG from www.grisoft.com is very popular on this forum. But Avast (www.avast.com) is being used also. And, of course, some online-scanners if resident antivirus is suspected.
A complete list: http://www.freebyte.com/antivirus/
Optical mouse works on every surface. Trackball mouse prefers mousepad. Trackball mouse must be cleaned regularly. Wired moused need no batteries, and are less prone to being misplaced somewhere. I think a wireless optical mouse needs more batteries than a trackball equivalent. And a wireless mouse isn't likely to work in safe-mode (only a regular ps/2-mouse is supported then). A wireless mouse is somewhat easier to use because of not having a cord.
I can't see any advantages in a wireless keyboard, unless you hate the cord on your (real!) desktop.
If I am in the wrong place to post these questions could you please redirect me.
Have been using e trust from computer associates as my antiviral. Is there a good free program to replace this?
Where would i find the pros and cons on an optical vs a trackball wireless mouse. what are the pros and cons of a wireless keyboard?