Computer Tutorial

Removing the Attributes on MSDOS.SYS:-

                                                                                                    Warning: If DOS is your computer's Operating System, Do Not remove the attributes or change the contents of the MSDOS.SYS file.
Although MSDOS.SYS is a required start-up file in Windows 9x, it is no longer a binary file as it was in DOS. It's actually a simple text file that contains start-up information for the Operating System. It tells the computer where to find the Registry, and defines the location of the boot drive, different start-up files, and the location of the Windows directory. But, it also has an [Options] section that allows you to manipulate some of the start-up processes. Windows 9x sets the System, Hidden and Read-only attributes on MSDOS.SYS. Because it is a system file, it's important to back it up before you fool with it.
If you haven't already done so, you'll have to change the View in Windows Explorer to allow you to see hidden files. Click START/PROGRAMS/WINDOWS EXPLORER.
On the menu bar at the top of the window, click 'View' and choose 'Folder Options'. You'll see 3 tabs at the top, choose 'View'. Make sure the radio button that says "show all files" is selected. Click OK.
In the left pane of Windows Explorer, highlight the C: drive. You should now be able to scroll down in the right pane and find MSDOS.SYS. Copy it to a safe place before making any changes.
Now you'll have to change the attributes before you can do anything with the file. Right-click on MSDOS.SYS in Windows Explorer and choose 'Properties'. Uncheck all the boxes for the files attributes and click OK. Now you can perform any of the changes below.