My antient HDD that I don't have any money to replace has started to load nothing time to time.

I don't mean that it won't load, it's just that it's reading and or writing when i'm not doing anything, or even when I am, BUT, for no reason...

It does this everytime I open Internet Explorer to... It loads for about 1-5+ minutes, and when I go to different websites it also does this.

I just installed Windows XP Professional Corporate edition with SP2 last weekend and it's been working fine up until the past 24 hours...

It's a Quantum Fireball HDD 30gb, I've never had a good enough reason to replace it until now and I still would like to keep it and save the money.