bill - 3:01 am on Nov 15, 2012 (gmt 0)
Windows 8 has Windows Defender built-in, so there's no pain involved there. It seems that paying attention to security on Linux involves keeping track of a lot of arcane news that involves in-depth knowledge of the particular *nix variant you happen to be running.
If I put Linux on grandma's machine how easy would it be for her to pay attention to security? On Windows 8 it's not really an issue.