These have been copied from previous posts & my own experiences .
Overkill I know , but there are a lot of reasons .
-------------------------------------------
If it's not to late , go back to a good copy of the registry
( before your problem )
Press F8 during bootup ( when , verifying DMI pool message comes on ) or Press
Ctrl during bootup , depends on your computer .
Select , Command prompt only . ( NOT Safe mode Command prompt )
After the C prompt , type , scanreg /restore
Follow the prompts and select a registry dated prior to the problems .
When finished , type win & press Enter .
When you get your comp. up & running , use the system below . It gives
you 14 days of registry backups .
http://www.pcnineoneone.com/howto/regback1.html
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Start > Settings > Control Panel > System > Device Manager , click on the + next to Disk drives .
Double click on the drives you have installed ( 1 at a time or if you know which drive is the
problem ) , click on Settings & untick DMA .
----------------------------------------
Go to Start > run , type in msconfig , on the general tab , click on
advanced and check if the Force Compatibility mode disk access box is
checked , uncheck if it is .
-----------------------------------------
FOR WINDOWS 98/98SE only!
GO TO > START > RUN: key in "msconfig" > hit "ENTER."
At the "System Configuration Utility" (GENERAL) Tab,
UNCLICK both "Process Config.sys file" & "Process Autoexec.bat file," then Restart.
This fix does away with the conflicts between the two equally troublesome Intel and Microsoft
IDE controller drivers.
-----------------------------------------------
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q190303
The Windows 98 Startup disk includes a set of generic real-mode CD-ROM drivers. These drivers
work with most Integrated Device Electronics (IDE) ATAPI-compliant and Small Computer System
Interface (SCSI) CD-ROM drives.
This article describes how to configure your computer to use the real-mode CD-ROM drivers from
the Windows 98 Startup disk. This may be useful when you need real-mode drivers for your CD-ROM
drive, or when you are unable to configure the Windows 98 protected-mode CD-ROM drivers to
function correctly.
---------------------------------------
http://asia.cnet.com/itmanager/tech/0,39006407,39084405,00.htm
If you view the information on the Performance tab (Control Panel >
System), you may see a message:
Compatibility Mode Paging reduces overall system performance
Some drives are using MS-DOS compatibility
This means that your floppy disk drive or CD-ROM drive are operating
in MS-DOS compatibility mode. We'll discuss only hard disks operating
in MS-DOS compatibility mode here.
To force Windows to attempt to reinitialize the protected-mode IDE
driver you'll have to remove the noide entry from the registry:
1. Start the Registry Editor
2. Go to HKEY_LOCAL_MACHINE \ System \ CurrentControlSet \ Services
\ VxD \ IOS
3. Delete the NoIDE entry
4. Search your registry for BAD_IDE (You can Search the registry by
pressing F3 while working in the registry editor.
5. Delete any BAD_IDE values you find
Or,
1. Select NOIDE.INF in the \Tools\MTSutil folder on the Windows 98 CD.
2. Right-click NOIDE.INF
-or-
Hold down the Shift key and press the function key F10.
3. Choose Install to remove the NOIDE entry.
From,
http://members.home.net/scotterpops/fixes/fixes8.html
After you update the registry, restart Windows. Windows will then
attempt to initialize the protected-mode driver for the controller.
If no problems are encountered, the file system and virtual memory
will operate in 32-bit mode, and Device Manager will not display an
exclamation point in a yellow circle for the IDE channels.
If the protected-mode driver is not initialized properly, an error
message will be displayed and the NoIDE registry entry will be
re-created.
---------------------------------------
There are several reasons why your Hard Disks might be running in
MS-DOS compatibility mode:
An "unsafe" device driver, memory-resident program, or virus hooked
the INT21h or INT13h chain before Windows loaded .
The hard disk controller in your computer was not detected by Windows.
The hard disk controller was removed from the current configuration
in Device Manager .
There is a resource conflict between the hard disk controller and
another hardware device .
The Windows protected-mode driver is missing or damaged .
The Windows 95 32-bit protected-mode disk drivers detected an
unsupportable configuration or incompatible hardware .
Microsoft recently released an update for Windows 95 OSR 2 & OSR 2.1,
to fix a problem that would stop the computer from responding (hang)
while the hard disk was being accessed, when using an IDE (ATA) hard
disk and controller that support Ultra DMA mode.
To install this update, follow these steps:
1.Download the Remideup.exe [143KB] file to an empty folder
2.In Windows Explorer, double-click the Remideup.exe file you
downloaded in step 1
3.Follow the instructions on the screen
-----------------------------------
You can lock and unlock a hard-drive from the A:\>_ prompt in REAL
mode DOS?
LOCK sets it in a DOS compatibility mode so disktools can directly
access the drive.
UNLOCK unlocks it .
For instance
UNLOCK C:
You have a problem whan it says unlock failed...or you are running
DOS from a dosbox .
You don't do disk jobs like that in protected mode... THAT's a NO-NO
(you should not run fdisk in a dosbox...)
In case you did not know , FORMAT needs to lock a drive to be able to
format it .
After formatting a hard drive in DOS , you must reboot .
_____________________________________
http://discussions.virtualdr.com/Forum2/HTML/028152.html
My 2 cdrom drive are missing
in system/performance I get message:
Performance status
Memory: 64.0 MB of RAM
System Resources: 72% free
File System: Some drives are using MS-DOS compatibility
Virtual Memory: MS-DOS compatibility mode
Disk Compression: Not installed
PC Cards (PCMCIA): No PC Card sockets are installed.
Select an item, and then click Details for more information.
Compatibility-mode paging reduces overall system performance.
Drive C is using MS-DOS compatibility mode file system.
Drive D is using MS-DOS compatibility mode file system.
Drive E is using MS-DOS compatibility mode file system.
Last time this happened I did an over the top re-install is there an
easier way ?
Well there are a few possibilities here.
Re-installation of Windows is not really necessary.
Try these suggestions first.
Go to Device Manager ( Windows key + Pause/Break keys together, then
select Device Manager tab) and see what Conflicts you have in there.
Most probably Hard Disk Controllers will have exclamation marks on
some entries. IE. yellow!
Also check your Autoexedc.bat and Config.sys files for CD-Rom entries,
(Start/Run and type in sysedit) this is normal when you install the
Dos CD-Rom drivers, you don't need them for Windows. Type rem in front
of the entries followed by a space if found, IE. Rem Cd rom blah blah
blah etc. there may be 2-3 entries concerning the Cd-Rom. Then close
down, wait 15 seconds and boot the PC back up again.
Next the Registry, go to this key and see if you have the NOIDE entry
there, in the righthand window.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\IOS
If you have the Win98 CD handy, there is a file on the CD called
Noide.inf ( \tools\mtsutil) right click on the file and select
install, this will remove the NOIDE entry in the registry. Close down
and again wait 15 secs, then boot up the PC again.
No cdrom , copy Noide.inf to a floppy from another
computer & install it .
------------------------------------------
Another possibility .
1 . Press Delete at bootup .
2 . Press Enter on Standard CMOS Setup .
3 . Use the arrow buttons to get down to Primary Master .
4 . Use the Page up or Down buttons to set on Auto .
5 . Repeat for Primary Slave .
6 . Press Esc .
7 . Use the arrow buttons & go to IDE HDD Auto Detection .
8 . Press Enter .
9 . Should select correct drives .
10 . Press y & Enter , for all drives .
11 . Arrow down to Save & Exit .
12 . Press y & Enter .
If Auto in steps 4/5 dos'nt work , manually put all the info for the
HD in by using the page buttons . The info is usually on the back of
the HD .
--------------------------------
http://www.geocities.com/~budallen/tsmsdos.html
http://www.geocities.com/~budallen/mscompat2.html
http://support.microsoft.com/default.aspx?scid=kb;EN-US;130179
http://support.microsoft.com/support/kb/articles/Q175/6/29.ASP
http://search.microsoft.com/us/Sear...i=06&i=08&i=01&i=03&i=05&i=07&i=09&p=1&nq=NEW
http://search.microsoft.com/us/Sear...i=06&i=08&i=01&i=03&i=05&i=07&i=09&p=1&nq=NEW
http://www.infinisource.com/techfiles/msdos-compatibility.html
http://216.167.71.32/techfiles/msdos-compatibility.html
Thanks heaps, bacillus and jmatt, we'll try those.
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