Under the Performance tab of the System Properties window there are several references to "MS-DOS compatibility mode". Both the Virtual memory and File system settings indicate that this mode is in operation. Then in the summary window, listed are three items: Compatibility mode paging reduces overall system performance, Drive C is using MS-DOS compatibility mode and Drive D is using MS-DOS compatibility mode. (I am currently running two hard drives as master/slave) The Details for the ..reduces overall system performance is as follows: Windows Millennium Edition was unable to identify a real-mode driver or memory-resident program loaded in your Config.sys or Autoexec.bat file. You will see another message that lists the name of the driver or program causing the problem. Because Windows Millennium Edition could not identify the driver or program, it has switched to MS-DOS compatibility mode to ensure the program will run. However, this decreases overall performance. To improve performance, remove the program or driver causing the problem, or contact its manufacturer for an upgraded version. My difficulty is in determining the program and/or driver that is causing the problem. Any assistance would be greatly appreciated. Darrel

In device manager... Do you have an exclamation point on anything? Also... under hard disk controllers... Do you have a Bus Master, a Primary IDE controller, and a Secondary IDE controller?

newgrl - the only exclamation I have in Device Manager is under the Mouse : Standard PS/2 Port mouse (my mouse is currently connected via USB port). Under Hard Disk Controller, I do have all three of the controllers that you'd asked about (and they appear to be functioning fine). Thanks for your help. Darrel

Ok... Boot into safe mode. Unhide all hidden system files. Browse to c:\windows\system\iosubsys Change the view to details. You are looking for dates. Put anything in this folder not dated 6/8/2000 into some sort of backup folder you create. Once finished... reboot. Check the performance tab. If that works start putting things back in the IOSUBSYS folder one at a time. Reboot after each entry. If it does not... post back.

I tried the above procedure, and still have no luck... Any other suggestions?

I have the same problem on a IBM thinkpad, however my problem arose after trying to install a zip drive in a portable drive bay. Seems like the drivers from Iomega are to blame. What is the next step? Thinkpad 240 Celeron 300 192 mb ram 6.4 gig windows 98 No errors in Device Manager

arrrrrr... i have the same problem too. After reformatting hard disk (and therefore having to install all my drivers again) I have that EXACT message as well... havent tried newgrl's idea.... will let u know, hopefully problem will be solved (first page Ive visited to find a solution....