So today when I turned on my PC, the fans inside made loud noise and it wasnt even steady. It was going from low to high all the time, like the fans kept speeding up and slowing down.

I dont remember how I got the idea but I though "lets remove the front panel". I removed it thinking "I've never done this before and I might break something but I dont care; whatever happens, happens".

Anyway I opened and I saw the interior filled in dust. And not just a thin layer of dust on top of the horizontal surfaces. It had even created many of those dust-balls all over the place: on the bottom, on the graphics card and a lot of it was stuck in the metalic spiralbehind the CPU's fan.

So I looked up on the internet for some guides on how to clean the interior of a PC. All of them mentioned compressed air.

I didnt havy anything like that, so I just tried to blow the dust away with a magazine. It did work for most of the dust but it was still dusty (it had THAT much dust).

So I though "If I am going to do this, lets do it properly".

So I went outside (!) took the bus and went to a local electronics shop. I bought the compressed air spray and returned home (for some reason the guy there told me to not use it immediately but to wait, I dont know why. I used it right away. It worked fine).

Anyway so it really helped to clean up the dust from the VGA, the PSU and the rest parts except for the metal spiral thingy behind the CPU's fan. Of course when I pointed it there, I did see a lot of dust blowing out from the back but there was still this net-dust clogged inbetween the metal sheets. I left it.

I closed it again and now there is no loud noise.

If only you could see how it was with the dust. It was literally like some old rooms left unopened for years and then you walk in and no surface is visible due to dust.