Error: Invalid System Disk error starting Windows due to missing IO.SYS file.
Error:
Invalid System Disk.
Cause:
The IO.SYS file is missing from a boot disk, or the disk in the drive is not a system disk.
Solution:
Use the Startup diskette to restore the system files.
NOTE: The following task should be performed by an advanced Windows 95 user.
1) Insert the Windows 95 Emergency Startup Diskette into the drive.
2) Reboot the computer.
3) Type the following lines at the MS-DOS command prompt, and press ENTER after each line:
C:
(where C: is the letter designation of the root drive)
CD\WINDOWS\COMMAND
ATTRIB C:\MSDOS.SYS -H -S -R
REN C:\MSDOS.SYS C:\MSDOS.XXX
NOTE: The above line renames the original Msdos.sys file.
<drive>:
(where <drive> is the letter designation of the drive containing the Startup diskette)
SYS C:
DEL C:\MSDOS.SYS
REN C:\MSDOS.XXX C:\MSDOS.SYS
ATTRIB C:\MSDOS +R +S +H
4) Remove the diskette.
5) Reboot the computer.
