Computer making wierd "beeping" like noises

[Temporal]

dont know how to discribe the sound i'm hearing but beeping seems the best way to describe it.
However this beeping noises isnt the same beeps i hear when i get a system error.
The beeping noises are completely random and start and stop when certain aplications are being run, mostly games.

I first encounted this noises a few months ago when i installed a program that was supposed to scan your system and display your specifications at a detailed level and such, and contained many other misc functions.
When i used it to run a scan my computer started creating that wierd beeping noises consistently and would only stop when i restarted it.i uninstalled the program quickily and unfortunately i do not remember the name.

now months after that incident my computer started creating these beeping noises again, which was after turned off 3D sound settings in a game called "Freelancer" to fix a sound problem i had where alot of the sound would skip.

the beeping sound would only come when i played that game so i stopped. however recently it started to spread.
it made beeping sounds while i was running diskcleanup as well, and now almost every game i play i encounter this sound, games like Halo, counterstrike etc.

i also noticed that my sound would get distorted/skipped whenever the beeping sound came.

the beeping sound seems to come from either my harddisk or my motherboard, which ever i am not sure.

i would greatly apreciate any help on this problem.

my system specifications are

Gigabyte P4 titan 865E motherboard
Onboard sound Realtek AC'97 Audio
512MB RDRAM
Seagate Barracuda 7200.7 120GB
256MB Saphire Radeon 9800 XT Atlantis
P4 3.06ghz with HT

[raven]

Most likely it comes from the hard drive. If i were you i wolud start making backups of your files. You might also want to get Norton Ghost to clone your drive.