A while ago I changed the setup on my HTPC and changed from IDE to AHCI in bios, after changing the appropriate settings in registry and so on of course. After I did this I started getting random lockups while watching video files. VLC would freeze up in one frame and repeat a short burst of sound with a few seconds interval and it wouldn't move on from this. Also, even if I opened the task manager I couldn't shut down the program, it alwasy took something between half a minute to a minute before it closed down and I could resume watching from the same instant as it froze. I got so annoyed with this so I changed back to IDE again and after that this problem disappeared completely. I didn't really notice any benefit from AHCI over IDE but it was a test to see if it would make a difference and the only difference I notices were these lockups. I have no problem staying with IDE, it works perfectly well as is, but it does annoy me that I can't figure out what caused this. Anyone got any idea?