Windows9x does not rely on a CONFIG.SYS and AUTOEXEC.BAT file to the extent that DOS did
With DOS, all drivers for such things as CD-ROMs, Sound Cards, SCSI adapters, Mouse drivers, SmartDrive etc. were required to be loaded in the CONFIG.SYS or AUTOEXEC.BAT file.
Due to the amount of conventional memory these might use, this also usually required HIMEM.SYS and EMM386.EXE in order to install as many as possible into the Upper Memory area
Since Windows9x will automatically load most of these drivers and programs into extended memory, the need for them, as well as any memory managers, is pretty much gone.
On a typical installation of Windows9x, you have booted to DOS and installed your CD-ROM drivers etc.. After Windows9x is installed, it leaves most of these still there
You can pretty much delete all of them. If you are a little cautious you might try remarking them out, rebooting, and making sure that particular part is still functioning
For example, on my system there is no CONFIG.SYS file at all. The only thing I have is DOSKEY /INSERT in the AUTOEXEC.BAT file. For a hardware configuration I've got an IDE CD-ROM, three SCSI drives and a SCSI tape backup and a Sound Blaster AWE32.With DOS, all need some sort of device driver.All are now being managed by Windows95 and there is still close to 600K of conventional memory available.