dont use macafee, use a smaller, better, free av like avg
use spybot search and destroy and adaware to get rid of spyware
delete all tmp, old, bak files and stuff you dont need
uninstall any programs you dont need
delete cookies, internet files you dont need
use start/run/msconfig/startup and disable stuff that start at startup that you might not need.....sometimes it can be hard to know what to keep running and what to disable tho (as a guide anything that mentions your firewall or antivirus keep, things that relate to your motherboard mainly)
Does your wife know what your up to mel when your in your own little world?