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Tech Helproom


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Unable to start computer


Snrub
Resolved

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Following a power cut my computer will not start. It now shows a black screen with BootMgr missing with the only option press Ctrl-Alt-Delete wich restarts the computer with same black screen Boot Mngr missing. Any ideas on how to proceed.

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Fruit Bat /\0/\

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Op system?

assume Vista or W7

Do a Start up repair

You need to look at Windows Repair Your Computer options.

  • Startup repair - This automatically fixes problems that are preventing Windows from starting
  • System Restore - This will Restore Windows to an earlier point in time
  • Windows Complete PC Restore - This will completely restore your entire PC - programs, system settings and files - from a back up that you have previously created (Available in Windows Vista Business, Enterprise and Ultimate editions only)
  • Windows Memory Diagnostic Tool - This checks your computer's memory hardware for errors
  • Command Prompt - This opens a Command Window

With the Complete PC Restore Option you must have made a backup of your system, either on your hard drive or on a set of DVDs, in order to use this option. If you don't have a backup then don't use this option

How you access the repair options will depend upon whether you have a Windows installation disk or whether your operating system came pre-installed by your PC manufacturer.

Pre-Installed Options NOTE

If no repair options are available your PC manufacturer may have replaced the tools or customised them. Check your Computer Manual before proceeding.

1/ Start your PC

2/ If your PC has one operating system Press and Hold the F8 key as your PC starts. If the Windows Logo appear you will need to start again

3/ If you have a dual boot system a Boot option menu will appear. Highlight the Windows operating system and Press the F8 key

4/ In both cases, if all has gone well, an Advanced options screen will now appear

5/ Highlight the repair Your Computer option and Press Enter

6/ Select a keyboard layout, and then Click the Next button

7/ Next select your user Name and Enter your Password, then Click OK

8/ The recovery options should now appear

Windows Installation Disk NOTE

1/ make sure your PC can boot directly from the Windows DVD. Obviously, most modern PCs can. With older machines you may need to check the PC's BIOS

2/ Start the PC

3/ Immediately insert the Windows DVD into the DVD drive

4/ A Black screen will appear with the words 'Press any key to boot from CD or DVD'

5/ Press Any key to start the booting process

6/ A new screen will now appear with a progress bar. The legend say's 'Windows is loading files'

7/ After a few minutes the Microsoft copyright window ill appear and another small progress bar will be visible

8/ You will next see a Blue curtained screen

9/ After a short while the Language option screen will appear

10/ Select your language and keyboard language and the Click the Next button

11/ At the bottom left of the next screen - the Install screen, Click on the Repair Your Computer option

12/ The System recovery options will now search for your Windows installation

13/ Once the Windows installation has been located, Highlight it and then Click the Next button

14/ You are now presented with the set of recovery options

15/ Click on the Option you require and follow the onscreen prompts

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Snrub

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Hi Fruit Bat thanks, using W7, initially Start up repair was an option but ran for ages suggesting a missing/ corrupt file/ signature error but did not fix poblem an would not connect to microsoft for solution. No surprise there! A restart then came up with BootMgr missing. Computer will not read Manufacturers repair disk F8 does nothing. Tried Bios set to read from CD drive, does nothing. Only F12 restarts computer into black screen with Boot Mngr missing only option Ctrl-Alt-Del with flashing cursor.

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Fruit Bat /\0/\

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Fro the Advanced Boot menu(F8) or DVD Goto command prompt and type

Bootrec.exe /RebuildBcd

press enter

Remove DVD and attempt to reboot

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Snrub

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As I said previously can only obtain BOOTMGR missing on black screen with only option Ctrl-Opt-Del and pressing del allows access to BIOS or pressing F12 just repeats BOOTMGR missing. F8 not an option for Advanced Boot Menu. CD and DVD says press any key to continue but nothing happens and command prompt is not an option! Any further ideas please?

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Snrub

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Managed to copy a system repair disc for W7 64bit from another computer and used it, now have a command prompt and ran Bootrec.exe/RebuildBcd which worked successfully. On start up the Windows start up logo now appears but then a bar starts on bottom of screen loading windows files. When this stops a startup repair commences and after several minutes states unable to repair with a problem signature shown. F8 is still not an option and F12 starts the same repair loop. Any ideas please how to proceed?

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Woolwell

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Suspect damaged/dead hard drive.

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woodchip

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Download the boot manager disc from the link, create a ISO Boot CD using Nero or another with the Link Software after you download it. Then boot the PC with it to try fixing the Boot.

Link to Boot CD

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woodchip

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Download the boot manager disc from the link, create a ISO Boot CD using Nero or another with the Link Software after you download it. Then boot the PC with it to try fixing the Boot.

Link to Boot CD

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Snrub

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I have now sorted problem up and running again. Used system repair disc to get into advanced system recovery. System repair did nothing. However command prompt Boorrec.exe/RebuildBcd did repair MBR. Then did a command prompt DISKPART>LIST DRIVES followed by DISKPART>LIST DISK selected repair option which brought up Acer Recovery system. Chose save files documents and pictures and reinstall manufactures OS system build which restored OS to that of out of box new build. Had to do lengthy windows update. Many Programs have been lost and spent a couple of hours reloading them. The only reason I can think probably caused original problem is that it occurred after doing a full registry defrag using Advanced System Care although I have to say I have used this program for several years on my 3 windows 7 computers without previous problems. I had backup disc images on a hard drive but could not access them so that was not an option. The problem I am now left with is taht my hard drive has mysteriously filled on c drive with little programs showing so need a disc partion manager to analyse disc content. Which is best to use?

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Fruit Bat /\0/\

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The only reason I can think probably caused original problem is that it occurred after doing a full registry defrag using Advanced System Care

No

Following a power cut my computer will not start.

Power cut while HDD in operation will result in corrupt HDD (why you had to rebuild MBR)

a startup repair commences and after several minutes states unable to repair with a problem signature shown.

Its always worth do a start up repair several times(at least 5 or until it repairs if less than 5) with VISTA or W7 I suspect W8 will be the same.

Always make an image of the op system partition to another drive when all programs installed and working and make sure you have a rescue CD that will restore the image. there are many free programs that will do this.

Restoring an image can get a PC working again in less than 30 mins much quicker than a factory restore and windows updating and reloading all your programs.

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