Tip & How-To about Computers & Internet

Boot problems and their possible causes & resolutions

Symptoms:
Black screen
"Invalid Partition Table"
"Error loading operating system"
"Missing operating system"


Cause:
Corrupt Master Boot Record (MBR)

Resolution:
Boot into Recovery Console and run "fixmbr" to repair the MBR

--

Symptoms:
"A disk read error occurred"
"NTLDR is missing"
"NTLDR is compressed"


Cause:
Corrupt boot sector

Resolution:
Boot into Recovery Console and run "fixboot" to repair the boot sector

--

Symptoms:
"BOOT.INI is missing or corrupt"
"Boot device inaccessible"
"Windows could not start because the following file is missing or corrupt:
\system32\hal.dll"


Cause:
BOOT.INI missing, corrupt or out of date as a partition has been inserted

Resolution:
Boot into Recovery Console and run "bootcfg /rebuild" to repair the BOOT.INI

--

Symptoms:
"Windows could not start not start because the following file is missing or corrupt:
\WINDOWS\SYSTEM32\CONFIG\SYSTEM"


Cause:
Corrupt/missing system hive

Resolution:
1. Boot into Recovery Console and run "chkdsk C: /f" to check the system disk for errors and fix them, then reboot.
2. If the error continues and System Restore is enabled, copy the system hive from the last restore point into \WINDOWS\SYSTEM32\CONFIG
3. If the error continues, copy the system hive from \WINDOWS\REPAIR into \WINDOWS\SYSTEM32\CONFIG
4. If the error continues, perform a repair installation by booting from the Windows installation media


--

Symptoms:
"Windows could not start because of a computer disk hardware configuration problem.
Could not read from the selected boot disk, Check boot path and disk hardware."


Cause:
Boot volume (with Windows folder) is not accessible as defined in BOOT.INI

Resolution:
Check the boot volume is accessible

--

Symptoms:
Dual-boot 32-bit Windows and 64-bit Windows system reports "NTOSKRNL.EXE is corrupt" trying to boot into 64-bit Windows

Cause:
System volume contains an older boot loader than the boot volume requires - e.g. XP SP2 installed after XP x64

Resolution:
Copy NTDETECT.COM and NTLDR from XP x64 installation media to the root of the system volume

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Related Questions:

1 Answer

Lenovo c340 6 gb How To Setup


Hi,
This issue may occur if one or more of the following conditions are true:
·The basic input/output system (BIOS) does not detect the hard disk.
·The hard disk is damaged.
·Sector 0 of the physical hard disk drive has an incorrect or malformed master boot record (MBR).
Note: Some third-party programs or disk corruption can damage an MBR.
·An incompatible partition is marked as Active.
·A partition that contains the MBR is no longer active.
Step 1: Check all hard disk and interface cables are properly connected and are in healthy state.
Follow the steps from: "Operating System Not Found" or "Missing operating system" error message when you start your Windows XP-based computer"http://support.microsoft.com/kb/321626

Or

Nov 11, 2013 | ErrorExpert

1 Answer

what is MBR in dos


MBR stands for Master Boot Record

During the booting process MBR points the system from which partition it has to load the operating system

Mar 13, 2013 | HP Pavilion Computers & Internet

1 Answer

after reading the BIOS software, my Gateway CX200X gives the message: MBR error. what is this?


MBR stands for Master Boot Record. It is an essential piece of information written on the Hard Drive that allows the program to load. If the MBR is corrupted the computer boot process cannot proceed.
You have to repair it.
On old systems with a floppy drive you would get a Win98 boot disk on a floppy, boot the system using the A:drive (floppy) then use a DOS command to refresh the Master Boot Record.
If your system is using Windows XP tablet PC edition you might be able to use the installation disk to boot to the recovery console and use the command FIXBOOT or FIXMBR. You can also reinstall the Operating System.
I hope this answer gave you some starting point to investigate further. There are on the web some software vendors who sell system recuperation CDs. Some may be free other you have to buy.

Jun 10, 2012 | Gateway CX200X Tablet PC

1 Answer

trying to restore to factory settings. i pressed f8 but option "repair your computer isnt there"


try cntrl + F11 at start up

WHAT CAN CAUSE PC RESTORE TO FAIL?
If the hidden DSR (Dell System Restore) partition is removed


If the MBR (Master Boot Record) is modified in any way (such as if you load the Vista Upgrade over XP)


If you change the MBR but the pointers to the DSR partition are left, the DSR will boot, detect that the MBR has changes, and flash a screen that informs you that the MBR has changed and that image restore will not run


If you create additional partitions, changing the MBR, Dell PC Restore will be disabled to prevent it from overwriting these partitions that may contain critical data during a restore operation


If you add a second SATA drive and migrate to a RAID array using the Intel applications accelerator in windows, running PC Restore will put the image back on C:\, but the system will not boot since the boot sector is looking for the ATA driver (factory image) and the bios is looking for the RAID driver (migrated configuration)

If any of these occur, you cannot set the system back to Factory condition. You must manually load the operating system, drivers, and all application software.

Mar 27, 2012 | Dell XPS 410 PC Desktop

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