My computer has been having problems for the past weeks or so. I think it has something to CPU usage since it will only let me open a certain number of windows at a time and even won't let me use certain things in them because there isn't enough room. So this slows down my computer drastically but then I also get popup add as well as random words in internet explorer become highlighted in green and when you roll your mouse over them a little window pops up with links to random places. I have McAfree but it doesn't pick up any problem on my computer. Anyone know what's wrong and how to fix it?