Missing window installer - Microsoft Windows XP Home Edition

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

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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

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Symptoms:
"BOOT.INI is missing or corrupt"
"Boot device inaccessible"
"Windows could not start because the following file is missing or corrupt:
<Windows root>\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BOOT.INI missing, corrupt or out of date as a partition has been inserted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

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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

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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

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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

You may be very familiar with the common messages while operating with windows which says that some files are missing.This may sometime cause you to lose your data or lead to abnormal termination of a program which requires the support of that particular windows file.Sometimes these file missing problem can be so severe that you may not be able to boot into windows.Such kind of problems occur when we accidentally delete some of our system files either manually or while the anti virus program on our system shows that the file is infected and on its prompt for what to do next, we will choose to delete the file.Well these problems can be solved if you have got a disc of Windows Xp Service Pack2.
If you are able to boot into windows then from the start select run and then run “cmd”.Then the command prompt window appear and after inserting the disc of Windows Xp ServicePack2 in the drive, in command prompt type “SFC/SCANNOW”.The system will then search and copy the windows missing file.
If the file missing problem is so severe that you are not able to boot into windows then, boot the windows using the Windows Xp disc.Then continue the process for installing a fresh copy of windows.While you advance through the process, the windows displays previously installed windows.From there the installer will ask you to press R to repair the existing windows.Press R and the windows will do the rest for you.