Josh, None of us live with you....therefore no one here can stick their head next to the PC to find out where the noise is coming from. Try to post back a bit more specifics....and if you've never cleaned up the computer...get yourself a can of compressed air - open the case and have at it.
wellll.....you cna mention if there's a clicking sound..but other than that, yeah, who knows LOL...it could be the HDD, CD/DVD-ROMS drives, hell shizzz, it can be a floppy disk drive going off, ...or probably it could be the crap load of dust withing your PC, which i bet you do now....so yeah, like what morph said...get a compress air bottle..you can get that at wal-mart, office max, radio shack...n etc., also i recommended you gettin anti static wipes...to wipe off any dust or ne unknown substances that can't come off your pc...MAKE SURE your pc is off and grounded when you wipe your componenets doh...well hope that helps..but please be more specific, so we can get down to the point lol
The odd noise guide: Clicking=CD-DVD-Floppy acting up, failure to read Chainsaw on startup: PSU fan Szhzhhz: Dust, Case fans Humming: The normal sound of a PC, Live with it. Low Pleasent Humming: New Case Fan