This example illustrates how to determine a specific startup setting that causes an undesired behaviour in one of your programs:

1. Clean boot the computer:
2. On the General tab in the System Configuration Utility, click Selective Startup.
3. Click to clear all of the check boxes in the Selective Startup section, and then click OK.
4. When you are prompted to restart your computer, do so.
5. When you test your program, the behaviour no longer occurs.

   NOTE: If the behaviour still occurs, you may not be able to resolve the behaviour by clean booting your computer. Instead use the "Advanced Clean-Boot Troubleshooting" procedure, use the Microsoft Knowledge Base to query for information about the behaviour that you are experiencing, or contact Microsoft Technical Support.

6. To determine if a line in either the Win.ini file or the System.ini file causes the behaviour:
   1. On the General tab in the System Configuration utility, click Selective Startup.
   2. Click to select the both the Process Win.ini file check box and the Process System.ini file check box, and then click OK.
   3. When you are prompted to restart your computer, do so.
   4. When you test your program, the behaviour does not occur.
7. Nothing in the Win.ini file or the System.ini file causes the behaviour.
   To determine if a line in the Autoexec.bat file causes the behaviour:
   1. On the General tab in the System Configuration utility, click to select the Process Autoexec.bat file check box, and then click OK.
   2. When you are prompted to restart your computer, do so.
   3. When you test your program, the behaviour does not occur.
8. Nothing in the Autoexec.bat file causes the behaviour. Since the Winstart.bat file does not exist in this example, something in the Config.sys file must cause the behaviour.
   In this example, the Config.sys file contains eight lines. To determine which half of the file contains the line that causes the behaviour:
   1. On the General tab in the System Configuration utility, click to select the Process Config.sys file check box, and then click the Config.sys tab.
   2. On the Config.sys tab, click to clear the check boxes for the first half of the lines in the list. In this example, you click to clear the first four check boxes.
   3. Click OK. When you are prompted to restart your computer, do so.
   4. When you test your program, the behaviour does not occur. The line that causes the behaviour must be one of the first four lines in the Config.sys file.
   5. Re-select half of the check boxes that you cleared in step 2:
   6. In the System Configuration utility, click the Config.sys tab.
   7. On the Config.sys tab, click to select the first half of the check boxes that you cleared in step 2. In this example, you click to select the first two check boxes in the list.
   8. Click OK. When prompted, restart the computer,
   When you test your program, the behaviour does not occur. The line that causes the behaviour must be the third or fourth line in the Config.sys file.
   To determine which line causes the behaviour:
   1. In the System Configuration utility, click the Config.sys tab.
   2. On the Config.sys tab, click to select the first half of the remaining cleared check boxes that you cleared in step 5. In this example, you click to select the third check box in the list.
   3. Click OK. When prompted restart the computer.
   4. When you test your program, the behaviour does not occur. The line that causes the behaviour is the fourth line in the Config.sys file.

To restore your normal startup settings, click Normal startup - load all device drivers and software on the General tab in the System Configuration Utility, and then click OK. When prompted to restart, click Yes.

The information here applies to:

• Microsoft Windows 98
• Microsoft Windows 98 Second Edition