This article was previously published under Q101668
For a Microsoft Windows XP version of this article, see 314079.
When Windows is installed on a computer that has an Intel x86-basedprocessor and the boot record for the active partition or files required toboot Windows becomes corrupted, it is not possible to boot Windows orany other operating system on that computer.
To prevent this situation, create a Windows boot disk when youinstall Windows on the computer. This disk is different from an MS-DOSboot disk because the entire Windows operating system cannot fit on onedisk as MS-DOS can. A Windows boot disk contains the files necessary tostart the operating system with the remainder of the Windows systemfiles installed on the hard disk drive. Use the following procedure tocreate this disk:
Place a blank floppy disk in drive A and format the disk using Windows NT or later.
From the root folder of the system partition of your hard disk drive (for example, C:\-), copy the following files to the floppy disk:
NOTE: You may have to remove the hidden, system, and read-only attributes from the files.
Restore the hidden, system, and read-only attributes to the files on your hard disk.
If either the Bootsect.dos or the Ntbootdd.sys file resides in the system partition, perform steps 2 through 4 above to copy these files to the boot disk as well.
If you format a floppy disk in Windows NT or later, the boot record points to the NTLDR file. When NTLDR runs, it loads the available operating systemselections from the Boot.ini file. If the user selects Windows, NTLDRruns Ntdetect.com, and then passes control to Osloader.exe. If the userchooses MS-DOS or OS/2, NTLDR loads Bootsect.dos.