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Dual boot is lost

Posted on 2003-02-28
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Last Modified: 2010-04-13
After working fine with dual boot (98 & W2K),
I have reinstalled windows98. Now, when I boot the PC it does not ask me which OS should it boot from.
Each OS has it own partition.

How can I restore this?

10x
Peled
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Question by:peledc
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LVL 44

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by:
CrazyOne earned 2000 total points
ID: 8041780
Differences Between Manual and Fast Repair in Windows
http://support.microsoft.com/default.aspx?scid=kb;en-us;238359

BEGIN ARTICLE

--------------------------------------------------------------------------------
The information in this article applies to:

Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Server
--------------------------------------------------------------------------------

SUMMARY
Windows includes two repair choices: Manual Repair or Fast Repair.

To see these choices, boot from the Windows installation media, press R to repair, and then press R to use the Emergency Repair process. When you do this, you see the following options:

Manual Repair: To choose from a list of repair options, press M.

Fast Repair: To perform all repair options, press F.

The two repair choices cause the Repair process to perform different tasks.

MORE INFORMATION
IMPORTANT : Please do not perform a manual or fast repair on a domain controller without specific knowledge of how to back up the Active directory database. If you do these options on a Windows 2000 Server domain controller you run the risk of overwriting the Active directory database at \WINNT\NTDS\ntds.dit.

The Ntds.dit file contains your Active Directory,including user accounts.

Manual Repair
The Manual Repair option provides the following choices:
[X]  Inspect startup environment
[X]  Verify Windows system files
[X]  Inspect Boot Sector<BR/>
     Continue <perform selected tasks>
Inspect Startup Environment
This option checks the ARC path in the boot.ini file for a path to the Windows boot partition and %SystemRoot% folder. It does this by using the Setup.log file on the Emergency Repair disk by reading the following values:
[Paths]
TargetDirectory = "\WINNT"
TargetDevice = "\Device\Harddisk1\Partition1"
SystemPartitionDirectory = "\"
SystemPartition = "\Device\Harddisk1\Partition1"
If the Boot.ini file is missing, a new one is created with a valid ARC path. If the Boot.ini file is present, the ARC path is checked and updated if needed.
Verify Windows System Files
This selection verifies that each file in the Windows system/boot partition is good and matches the files that were originally installed. This includes the Ntldr, Ntdetect.com, Arcsetup.exe, and Arcldr.exe files that are used for booting various computers. The optional Ntbootdd.sys file is never checked. Repair performs this check by using the Setup.log file to compare cyclical redundancy check (CRC) values for each file. If files are missing or corrupted, you are prompted to replace or skip the file. If you choose to replace the file, you need the Windows installation CD-ROM or an OEM driver disk that contains the correct file(s).
Inspect Boot Sector
This option repairs the active system partition boot sector and reinstalls the boot loader functionality. If the partition uses the FAT or FAT32 file system and contains a non-Windows boot sector, this repair option also creates a new Bootsect.dos file to be used to dual-boot MS-DOS, Microsoft Windows 95, or Microsoft Windows 98 if these operating systems were previously available to be booted. If you also select the Inspect Startup Environment option and a new Bootsect.dos file is created, Repair adds the following entry to the Boot.ini file:
C:\ = "Microsoft Windows"
Note that the Manual Repair option does not give you a choice to repair the Windows registry files.
Fast Repair
The Fast Repair option performs all the repairs as the Manual Repair option, but you are not prompted for choices. Additionally the Fast Repair option tries to load each Windows registry file (SAM, SECURITY, SYSTEM, and SOFTWARE). If a registry file is damaged or cannot be loaded, Repair copies the missing or corrupted registry file from the SystemRoot \Repair folder to the SystemRoot \System32\Config folder.

Because the Fast Repair option can replace registry files with those from the SystemRoot \Repair folder, it may revert parts of your operating system configuration back to the time when Windows was first installed. If this occurs, you need to restore your last "system state" backup or manually copy a more recent version of the registry files from the SystemRoot \Repair\Regback folder to the SystemRoot \System32\Config folder by using Recovery Console. The files that are located in the Regback folder are from the last time you created an Emergency Repair Disk and choose the option to also back up the registry files to the repair folder.
General Information
Both the Manual Repair and Fast Repair options start by performing a system/boot partition file system check. If file system problems are detected and corrected during this portion of the Repair process, you may need to restart your computer and start another Repair process before the actual repair operations take place.

Neither of the repair options replaces the SystemRoot \System32\Config.nt or Autoexec.nt files. Although these files are located on the Emergency Repair Disk, they are not checked or replaced during any Repair operations.

For computers without a local CD-ROM drive attached (for example, if Windows was installed by using Remote Installation Service, or RIS), it is possible to repair system files by using one of the methods described in the following Microsoft Knowledge Base articles:
Q164471 Replacing System Files Using a Modified Emergency Repair Disk
Q229716 Description of the Windows 2000 Recovery Console

COPYRIGHT NOTICE. Copyright 2002 Microsoft Corporation, One Microsoft Way, Redmond, Washington 98052-6399 U.S.A. All rights reserved.

END ARTICLE
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LVL 44

Expert Comment

by:CrazyOne
ID: 8041781
or

http://www.jsiinc.com/subh/tip3900/rh3920.htm

"3920 » How do I perform an in-place upgrade of Windows 2000?

If a repair does NOT cause your computer to operate normally, you may wish to try an in-place upgrade, a last resort before reinstalling. The in-place upgrade takes the same time as a reinstall.

To perform an in-place upgrade:

1. Boot the CD-ROM (or boot disks).

2. Press Enter to install a copy of Windows 2000.

3. Accept the License Agreement.

4. If setup does NOT detect a your installation, an in-place upgrade is NOT possible.

5. When prompted to repair the existing installation, press R. Setup will perform an in-place upgrade"
-------------------

http://www.jsiinc.com/SUBJ/tip4500/rh4508.htm

"4508 » What does a Windows 2000 in-place upgrade change and not change?

I described performing an in-place upgrade in tip 3920 » How do I perform an in-place upgrade of Windows 2000?

When you perform an in-place upgrade:

1. Service Packs, hotfixes, and IE upgrades are rolled back.

2. Default registry values are restored.

3. Default permissions are reapplied.

4. COM and WFP are reregistered.

5. Plug and Play devices and the HAL are re-enumerated.

6. Drive letters are changed based upon the current drive and partitions. See Q2324048 - How Windows 2000 Assigns, Reserves, and Stores Drive Letters.

The following is NOT changed:

1. Installed components and programs.

2. Passwords.

3. Third-party registry entries.

4. The computer's role.

NOTE: If you upgraded your computer from Windows NT 4.0, profiles were stored at %SystemRoot%\Profiles. The in-place upgrade creates a \Documents and Settings folder and changes the registry profile to point to it. To fix the problem, use the Registry Editor to navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList. For each user, there will be a SID sub-key and a Value Name of ProfileImagePath. Change the string value to point to %SystemRoot%\Profiles\<UserName>."
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