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How to perform a Diagnostic startup of Windows 98/Me

Situation:
You want to know how to start Windows 98/Me in an interactive, diagnostic mode.

Solution:
A diagnostic startup of Windows is used to selectively load or not load drivers and environmental variables. You generally use this type of startup to pinpoint the exact driver causing a problem.

NOTE: I STRONGLY advise that you back up files before altering them in case you make a mistake or something goes wrong.  If you have any questions, ask them first!  Drop me an email and let me know how I can help you.

Diagnostic startup
You can configure Windows to start with its Startup menu, or you can get to that menu manually.

At this point (regardless of the method you used) you have several options to choose from. We are going to address two of them:

Normal
If you select Normal, Windows will start up as if you had selected Step-by-step confirmation and said "Yes" to every prompt. Windows will also start in VGA mode, which is useful if you suspect the video driver is involved in the problem.

Step-by-step
During a Step-by-step startup Windows asks you whether it should load or not load specific drivers. The main advantage of this startup is that you eliminate all the DOS level drivers and environmental settings. You can selectively load or not load drivers and applets contained in the registry and the System.ini and Win.ini files.

The following table shows the prompts you will see and how you should respond to them. Please keep in mind that there will be some variations in file locations and what is listed. If you do not see a prompt or you get an unexpected prompt, do not worry. If you choose not to load a driver that Windows needs, you'll likely end up at a command prompt. Start over and answer "Yes" to that prompt the next time.

Driver to load Response Why that response?
Load DoubleSpace driver
(You may or may not be prompted for this.)
Yes
Necessary if you use disk compression. Otherwise, it has no effect. Loading it is precautionary.
Process the system registry?
Yes
Otherwise, you might as well start in Safe Mode.
Create startup log file?
Optional
Your choice - a log file can help if you encounter major problems.
Process your startup device drivers
(Config.sys)?
No
This will bypass any DOS-level device drivers.
DEVICE=C:\WINDOWS\HIMEM.SYS
Yes
Windows needs this to work.
DEVICE=C:\WINDOWS\DBLBUFF.SYS
You may or may not be prompted for this.
Yes
If you're prompted for this, Windows needs it.
DEVICE=C:\WINDOWS\NLSFUNC.SYS
Yes
Loads country specific information.
DEVICE=C:\WINDOWS\IFSHLP.SYS
Yes
Windows needs this to work.
Process your startup command file
(Autoexec.bat)?
No
This will bypass any DOS level drivers and environmental settings.
Load the Windows graphical user interface?
Yes
Otherwise, you might as well start in Command Prompt.
Load Windows drivers?
Yes
This will assist you in determining what drivers Windows is loading and the order in which they are loading.

The Windows drivers you need to load depend on what you are troubleshooting. Select "No" when prompted for a driver you believe may be causing a problem. Once you have gone through the entire list of drivers, Windows will start in VGA mode, which is 16 colors, 640x480 screen size. (This means your colors and icons may look strange - this is normal in this mode.

Returning to normal
To return your computer to its normal startup sequence, take the following steps while in Windows:

 
Following these instructions will enable you to troubleshoot different problems related to Windows startup.  Remember, it is STRONGLY advised that you back up files before altering them in case you make a mistake or something goes wrong. 

 

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