Sysytem was working fine.After a restart I rec'd the "blue screen". I have not added or changed any software or hardware recently. I cannot start up in the safe mode and I cannot go back to the last known good configuration. The basics of the message is as follows:

 

Unmountable_Boot_ Volume

 

Disable Bios memory options such as caching or shadowing.

 

Stop: 0x000000ed (0x87398E30,Oxc000009c, 0x00000000,0x00000000)

 

Thanks in advance for any suggestions!

 

 

 

 

 

 

 

 

 

 

 

 

 

Dimension XPS Series,Intel Pentium 4 Processor at 3.0GHz with HT Technology
1024MB DDR SDRAM at 400MHz Dell Enhanced Multimedia PS/2 Keyboard
19 in (19.0 in viewable) 1901FP Digital Flat Panel Display
128MB DDR ATI Radeon 9800 Pro Graphics Card with TV-Out and DVI
120GB Serial ATA Hard Drive (7200 RPM) 3.5in Floppy Drive
Microsoft Windows XP Home Edition,Service Pack 1
Logitech MX 500 Optical Mouse
Intel Pro 100M Integrated PCI NIC Card
56K PCI Data Fax Modem for Windows
Cyberlink Software Decoding for DVD Drives with six channels
16X DVD-Rom Drive
Sound Blaster Audigy 2 THX Certified Sound card with DVD Audio for Dimension
Altec Lansing THX Certified ADA995 Dobly Digital Speakers with Subwoofer
4X DVD+R/RW CD-RW Combination Drive
Winfast TV 2000XP Deluxe
Cable Modem