Toshiba Satellite 200 Series User Manual page 263

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If Something Goes Wrong
Windows 95 Isn't Working
You need to verify all drivers are being loaded.
You need to temporarily disable one or more specific driver.
You need to check for errors in the startup files.
Windows 95 uses a file called IO.SYS, which contains all the
information needed to start the computer. Although your computer
does not need the CONFIG.SYS and AUTOEXEC.BAT files to
start, it does process these files to support backward compatibility
with some programs and device drivers. The same holds true for
the SYSTEM.INI and WIN.INI files.
Programs and devices that are backward compatible are
designed to work with older operating systems and other pro-
grams. For example, many features of Windows 95 are back-
ward compatible with earlier versions of Windows. This lets
you use older programs in Windows 95.
Most of the information contained in these files is now stored in
the Windows 95 Registry. However, they are still processed during
system startup. BOOTLOG.TXT file contains a record of all the
components and drivers loaded during startup and the status of
each. When you select Step by Step Confirmation, you can view
all the startup files one line at a time to help diagnose the source of
a problem.
Command Prompt Only
Selecting Command Prompt Only runs all the commands in the
startup files (AUTOEXEC.BAT and CONFIG.SYS) and displays
the command prompt.
Use this option when you want to run MS-DOS or Windows 95
commands. This option is for advanced user's who are familiar
with MS-DOS and know what these commands do.