WARNING: This information is provided "as is" with no warranty. Use at your own risk!
This site is NOT affiliated with PB.

850: Device Manager Conflicts On The Hard Disk Controllers

Resolution
Restart the Computer.
Press and hold the <CTRL> key on the keyboard just before Windows starts to load.
Select Safe Mode from the Windows startup menu and press <ENTER>. (Usually option three)
Once in Windows, there should be SAFE MODE written in all four corners of the screen.
Right click the My Computer icon.
Click Properties in the shortcut menu.
Click on the Device Manager tab in System Properties.
Locate the section called Hard Disk Controllers.
Highlight the first items listed. Click the remove button.
Repeat this for all items listed.
Not all items will be able to be removed.
Insert the Restore Diskette and Master CD (Some systems do not require a restore diskette)
Click Start - Shutdown - Restart and Click OK.
The system will load to the restore menu. Choose EXIT.
From the prompt, type the following lines:
FDISK /MBR <ENTER>
FDISK /MBR <ENTER>
SYS C: <ENTER>
Remove the diskette and CD. Restart the computer.