All credit to J W Stuart
"How to repair and reboot to Windows 7:
a) Insert the Windows 7 System Repair DVD or Installation DVD and reboot.
b) Select the correct keyboard input method and click 'Next'.
Note: If you are using the Windows7 Install DVD then at the 'Install Now' prompt (Do not pick the Install Now option) instead choose the 'Repair your computer' option located in the lower left of the display.
c) The System Repair tool will search for a valid operating system and will report that "Windows found problems with your computer's startup options. Do you want to apply repairs and restart your computer?"
d) Click 'Repair and restart' and reboot again to the Windows 7 System Repair environment.
e) Click 'Next' at the keyboard selection prompt and when the 'System Recovery Options' screen appears verify that the "Use recovery tools that can help fix problems starting Windows" is selected.
f) Now from the menu list select the 'Command Prompt' option.
g) At the DOS prompt type the following three commands:
bootrec.exe /fixmbr
bootrec.exe /fixboot (may return an 'Eliment not found' message)
bootrec.exe /RebuildBcd
h) Close the command prompt window and click the 'Startup Repair' option.
i) The repair process may take some time, so wait until the process completes at which point you will see two messages "Windows cannot repair this computer automatically" and "Startup Repair cannot repair this computer automatically".
Note: Please perform step j as detailed, startup repair must be run multiple times.
J) Close this message window by clicking on the X in the upper right corner of the Send/Don't send window. Next click on the 'View advanced options for system recovery and support' option and from the main menu once again click 'Startup Repair'. This time the repair process may only that a few seconds and when prompted "Startup Repair could not detect a problem", click 'Finish' and run the 'Startup Repair' option one more time, click 'Finish', and then remove the System Repair DVD and click 'Restart'. Reboot the computer."
SOURCE: windows boot manager file: /boot/bcd status:
Try check your hard disk with the other machine. Try running hard disk diagnostic test. If there's a problem with diagnostic test i suspect your hard disk is faulty. If you tried connecting with other machine then same problem, suspected also hard disk faulty. You might need to change it.
SOURCE: on screen it says an unexpected I/O error has
this is a hardware issue, you may need to boot on safe mode and update most of the drivers installed, run windows updates too.
SOURCE: Windows boot manager-hardware failure
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Try pressing F-8 and look for last known good working configuration.
If you are trying to reload from CD/DVD drive and it continues to boot into your old windows configuration, Enter your BIOS settings, and change the boot order to CD/DVD and then Hard drive
SOURCE: windows boot manager for TOSHIBA PRO L300
You will need an original windows installation disc and not a recovery disc. If you do not have one, then you have the option of taking to a shop that does and have them run the repair utility. Or, if you can find someone who has burned a copy of the windows ultimate boot disc, that will also help in repairing the boot manager and files.
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