Hello, For a while my computer have been making a electric leak like sound whenever the CPU usage gets high. However, lately it started to make it more often. For example with anti-virus searches and malware search softwares, the CPU usage goes up to 80 percent and this weird noise comes from the CPU. This sound sample i have recorded for you to picture the sound. This was recorded with microphone very near to CPU. The background humming noise comes from the fan, but I am very certain that this leak-like sound does not come from fan because it does not have a specific pattern and only occur with high CPU uges. The CPU usage was around 80% in this recording. rapidshare.com/files/336732081/buzzyNoise.mp3 For information, my configurations are: Intel Pentium 4 CPU 3.00 GHz 2 GB RAM Motherboard MSI 915P/G Neo2 Platinium ed. so not that bad. Thanks for your help in advance.