I am using Avira 9 free in my home computer (WinXP SP2) & it is running light. I have just Windows firewall on & go for bi-weekly scans with SuperAntispyware. Recently we have got another computer & my friends are suggesting Microsoft Security Essntials as security suite. Will MSE give the same protection as any other free AV suite? Also will it be light on resources? Will windows firewall be sufficient? Any reply from members will be highly appreciated.