Hi, I have written on here a couple of times about my BSOD problem, but still haven't found out what is wrong. It usually happens when I am copying files from CD to HD, or around the HD. Sometimes it just crashes, but usually it is when i move my mouse, sometimes when I am listening to music at the same time. The Blue Screen says something like: DRIVER_IRQL_NOT_LESS_OR_EQUAL 0x000000D1 (0X05000404, 0X00000002, 0X00000000, 0XF7AF0E2A) usbuhci.sys - Address F7AF0E2A base at F7AEE000, Datestamp 3d6ddc30 My System Specs: Motherboard: MSI PX8 Neo-V (Skt478) CPU: Celeron 2.6Ghz RAM: 2x 512mb 333Mhz PC2700 LG Super Multi (Dual Layer DVD) 350w PSU Please don't tell me it's my RAM because i've tried heaps of different types and combinations and it doesn't make any difference! Minidumps are attached. Thanks for your help!