I have been here before with the same problem but let this computer sit for about 3 months! I purchased this optiplex 150 thru rent a center 2 years ago. They never gave me any recovery disc or anything. Anyway, the thing has been displaying the message on a blue screen that says: "A problem has been detected and windows has shut down to prevent damage to your computer"...unmountable boot volume.

Technical info: 0x000000ed (0x81f66e30, 0xc0000032, 0x00000000, 0x00000000) and at other times the first set of numbers are 0x81f09e30

Some folks say I need a recovery disc to fix it but have had no luck in getting one.I have cxalled dell and they cannot help me. I called rent a center and they tell me to get lost! Some say my computer is forever gone. Any susgestions would be greatly apprciated.