Notes on upgrading to MS-DOS 6.2 from OS/2 

 
If you have OS/2 on your computer, and the MICROSOFT MS-DOS 6 USER'S GUIDE referred you to the OS2.TXT file, carry out the following procedure that corresponds to your computer's configuration. 
If You Have Neither OS/2 Dual Boot Nor OS/2 Boot Manager
If you want to remove OS/2 from your computer but want to save the data on your hard disk first, carry out the following procedure:
To remove OS/2 and save the data on your computer:
 1.	Restart your computer using OS/2.
 2.	Back up the data files you want to keep onto floppy disks by using the COPY command.

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Caution   Do not remove OS/2 system files from your hard disk.
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 3.	Reinsert Setup Disk 1 in drive A (the startup drive).
 4.	Restart your computer by pressing CTRL+ALT+DEL.
 5.	When Setup displays the screen about a non-MS-DOS partition or non-MS-DOS files, choose to remove the 
             partition or files.
 6.	After you finish setting up MS-DOS, copy the data files you saved in step 2 from the floppy disks back to your 
            hard disk.
  
If You Have OS/2 Dual Boot with DOS or OS/2 Boot Manager with DOS

When Setup detects OS/2, it displays a "Non-MS-DOS Partition Detected" or "OS/2 Files Detected" screen. If Setup displayed the "Non-MS-DOS Partition Detected" screen, carry out Procedure 1. If Setup displayed the "OS/2 Files Detected" screen, carry out Procedure 2.
Procedure 1 To remove OS/2 and save the data on your computer:
 1.	When Setup displays the "Non-MS-DOS Partition Detected" screen, choose the "Continue Setup" option.
 2.	After you set up MS-DOS 6, make sure you can access your hard disk.
 3.	Back up the data files you want to keep onto floppy disks or a network drive.
 4.	See "Using Fdisk to Configure Your Hard Disk" in the chapter "Diagnosing and Solving Problems," and carry 
            out all the procedures that appear in the following sections:
·	"Making a Startup Disk"
·	"Using Fdisk"
·	"Deleting Non-MS-DOS Partitions"
·	"Deleting Logical Drives"
·	"Deleting an Extended MS-DOS Partition"
·	"Creating a Primary MS-DOS Partition"
·	"Formatting Your Hard Disk"
  
 5.	Restart Setup. To do so, insert Setup Disk 1 in drive A or drive B, and then type the following at the 
            command prompt:
	A:SETUP
	or
	B:SETUP
 6.	After you configure your hard disk, copy the files you saved in step 3 back to the disk.
  
Procedure 2 To remove OS/2 and save the data on your computer:
  
Note   If you have a version of OS/2 other than version 2.0, the names of the OS/2 files and directories on your hard disk may differ from those that appear in this procedure.
  

  
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Caution   Do not remove MS-DOS program files from your computer. 
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 1.	Back up the data files you want to keep onto floppy disks or a network drive.
 2.	If your Setup disks are compatible with drive A, insert Setup Disk 1 in drive A, and then restart your computer 
            by pressing CTRL+ALT+DEL. After Setup displays the first screen, press F3 twice to quit Setup.
	If your Setup disks are not compatible with drive A, create a startup disk for drive A. To do so, insert Setup 
            Disk 1 in drive B, and then type the following at the command prompt: 
	B:SETUP /F
	When prompted, choose to install MS-DOS on the floppy disk in drive A. After Setup is finished, leave the 
            startup disk in drive A, and then restart your computer by pressing 
	CTRL+ALT+DEL.
 3.	Make drive C current by typing the following at the command prompt:
	C:
 4.	One by one, make each of the OS/2 directories and subdirectories current by using the CD command, and 
            then delete all the files in them by using the DEL command. For example, to make the SYSTEM subdirectory 
             in the OS2 directory current and delete all the files in it, type the following at the command prompt:
	CD \OS2\SYSTEM
            DEL *.*
5.	After you have deleted all files in these subdirectories, delete the subdirectories by using the RD command. 
            For example, to delete the SYSTEM subdirectory in the OS2 directory on drive C, type:
	RD C:\OS2\SYSTEM
 6.	After you have deleted all subdirectories in the OS2, PSFONTS, SPOOL, NOWHERE, and OS!2_2.0_D 
            directories, delete all files in these directories by using the DEL command.
 7.	Delete the OS2, PSFONTS, SPOOL, NOWHERE, and OS!2_2.0_D directories by using the RD command.
 8.	Move to another disk or directory all the OS/2 files in your root directory except the following:
	EA DATA.SF
            OS2lDR.MSG
            OS2lDR
            OS2KRNl
            OS2BOOT
            WP DATA. SF
 9.	Change to the root directory by typing the following at the command prompt:
	CD\
10.	Change the attributes of the five files listed in step 8 by typing the following at the command prompt:
	A:\ATTRIB -H -S -R C:\E*.*
            A:\ATTRIB -H -S -R C:\O*.*
            A:\ATTRIB -H -S -R C:\W*.*
11.	Delete the files whose attributes you changed by typing the following at the command prompt:
	DEL E*.*
            DEL O*.*
            DEL W*.*
12.	Return to the root directory the files that you moved in step 8.
13.	Remove disks from all floppy disk drives, and then restart your computer by pressing CTRL+ALT+DEL.
14.	Insert Setup Disk 1 in drive A or drive B.
15.	Run Setup again by typing the following at the command prompt:
	A:SETUP
	or
	B:SETUP
  
If You Have OS/2 Boot Manager Without DOS

To remove OS/2 and save the data on your hard disk:
 
 1.	Back up the data files you want to keep onto floppy disks or a network drive by using the COPY command.
 2.	Reinsert Setup Disk 1 in drive A (the startup drive).
 3.	Restart your computer by pressing CTRL+ALT+DEL.
 4.	When Setup displays the screen about OS/2 or non-MS-DOS files, choose to remove OS/2 or the files. 
 5.	After you finish setting up MS-DOS, copy the data files you saved in step 1 back to your hard disk.
  

 