Windows 7: sound and mouse freezing

okay so sometimes when im listening to music or movies or anything
the cursor freezes for a second and the sound freezes and sound goes like ''TRRRRRRRRRRRRRRRR''
im sorry thats the best way i cud describe it , i tried reinstalling windows it still didnt help , so plzz anyone out there , help!

Pertinent information on freezing.

Go to search type device manager and look for any yellow warning markers
Download and run malwarebytes, a full scan after you update
Run antivirus scan
Check memory with memtest86
Make sure that you are not over heating.
Try in safe mode; report back if it works properly.
Try a clean boot
Make sure PSU is working properly
If overclocking, restore to original
Test hard drive at company website.
Test in safe mode, does it still happen?

http://www.geekstogo.com/forum/topic...ing-memtest86/
http://support.microsoft.com/kb/929135
http://malwarebytes.org/
http://www.almico.com/speedfan.php

Windows 7 or Vista Freezes Frequently