• Click the Start button, point to Settings, and then click Control Panel. • Double-click System. • In the System Properties window, open the Performance tab. One of the following messages may appear: The Master Boot Record has been modified. Your system is configured for optimal performance. using MS-DOS compatibility mode file system. If the first message appears, click the Details button in the Performance tab. If the second message appears, you must update or install the driver. For help, see Installing Windows 95 Drivers. If the third message appears, remove the DOS driver from config.sys and autoexec.bat. • Click the Start button, and then click Run. • In the Run window, type sysedit and then click OK. • Go to the Autoexe.bat window. If there are lines containing files with *.exe, *.com, or *.bat extensions, type rem at the beginning of those lines. • Go to the Config.sys window. If there are lines containing files with *.sys extensions, type rem at the beginning o