Redownloading everything, etc etc.
And it's been around a week (maybe a little longer as well?) since that has happened, and now all of a sudden, my computer is coming up with a crapload of popups, and whenever I click for a 'new tab', the colour changes from a slightly dark gray to a light gray (I've taken screenshots since I can't explain)

^ Click on it for a bigger image.
I don't quite know how to explain this, but I know it's when you're using that one IE window, it's the first colour, if you're working on something else/using another program, it turns the second one.
But for some odd reason, when I click for a new tab, the colour changes to the second one, showing that I'm not "using" the window, when in fact I am.
It also randomly decides to do that too, such as when I'm in the middle of typing, all of a sudden it turns light grey and blocks out half of the stuff I type, which then I have to click on the window, the retype everything. (_o_)
& the popups are really wierd. It's come up with... A LOT of popups, especially those that look like my comp is warning me of a virus, but its really just an ad. I've also gotten a "win a macbook air!" popup like... 5 times today.
For some reason, the google toolbar popup blocker isn't blocking it, and this has NEVER happened to me before! I thought I could just turn it off and the problem was only temporary, but when I went back on it was still the same. ><;; It's wierd.
AND there's also some message that pops up when I first turn on my computer, I think this is the problem, it's something about a buffer? And something about a file being corrupted...
I can't remember, I took a screenshot but then I lost it because I forgot to paste it onto something. When I find it I'll post it up.
EDIT: it popped up again. O_O

I'm using Windows XP, I've had my computer for like... 4 years now. It's been fine, yesterday it worked REALLY smoothly, but today is when all these problems came up.
Not sure what's going on, therefore help? ><














