Windows 7 Windows Vista

Fix : “Bootmgr is missing press CTRL + ALT + DEL to restart” error in Windows 7 & Windows Vista

After reading this post you will be able to fix an issue where you get a error while trying to boot into Windows 7 ( start Windows 7 ) saying “ bootmgr is missing, press ctrl + alt + del to restart

The primary cause of this error is some damage or corruption in the Windows boot sector. This might happen due to a virus or any related DNA malicious software. Any normal file corruption in the file system can create this error as well.

Follow the steps below to rectify this error

  • Using Start-up Repair
  • Insert your Windows 7 or Vista Installation DVD at the time of system start-up ( boot from Disc )
  • Press Any key when prompted to “ Press Any key to boot from CD/DVD”
  • Select the appropriate options on the first menu ( language, currency, input ) & press next
  • Click Repair Your Computer
  • Select your operating system ( then one you wish to repair ) & Press Next
  • Within the System Recovery Options, Click Command Prompt
  • In the Command Prompt type Bootrec /Rebuildbcd & Press Enter
Windows 7 Windows Vista Windows XP

FIX : STOP Error : BSOD : kernel_data_inpage_error

This guide can be used for resolving the STOP error with the keywords “kernel_data_inpage_error”. Here we have listed a few ways to resolve these type of Blue screen errors. After troubleshooting kernel data inpage error a few times, it seems like the cause of this error resides in memory. In these cases memory refers to both RAM and Hard disk drive in your system. It’s not at all necessary that your hardware has a problem, though it’s a possibility. This error might also occur due to a faulty driver software. To get to a conclusion whether you have a software or hardware error, that is causing this BSOD, try the following:

Below is an example of the error you might be getting:

Stop 0x0000007a ( XXXX XXXX XXXX )
filename.sys – Address XXXXX

  • Use Windows Update to update your computer & drivers ( install all recommended and optional updates) ( optional updates most of the time have your device drivers )
  • If you don’t find new drivers on Windows update, go to your motherboard / Computer Manufacturer’s support site, Select your model / version –> download the Chipset , Display & communications / networking drivers and Install them.
  • Restart & check
  • If the problem still persists,
  • Go to Start menu and type CMD
  • Right click the Command (CMD) program that appeared in your start menu search results and click on run as administrator
  • now, type CHKDSK /p  & press enter.
  • After the scan is complete,
  • type, CHKDSK C: /f /r    (This will repair corrupted sectors )
  • Restart the system and check if the problem is solved.

If not,

If, problems are found, replace your RAM modules, if you have multiple modules try taking all of them out and then test with one module at a time and check for errors. repeat the step with all modules.

Last Step

System Restore : Click here for the Guide to using System Restore

Windows 7 Windows Vista Windows XP

What to do, When you can’t start Windows at all !!

After reading this you will understand various system recovery options within Windows 7. Some of them might also apply to other versions of Windows as well.

The System recovery options within Windows 7 include:

  • Last Known Good Configuration
  • Using Safe mode to start Windows
  • Checking if Display Resolution is the problem
  • Knowing the error before troubleshooting
  • Using Start-up Repair
  • Using System Restore
  • Using Backup/Restore
  • Checking Memory errors
  • Finally Re-installing Windows

Last Known Good Configuration

To use this feature, press the F8 key while the system is booting up, Go to the Advanced Boot Options & from the menu select “ Last Known Good Configuration” and press Enter. If your computer system boot fine, you are successfully fixed it.

Using Safe Mode to start Windows

To boot into Safe Mode. Press the F8 key while the system is booting up. This will show you a menu, Select Advanced Boot Options, from the options therein select Safe Mode from the list and press Enter.

This will let you boot into safe mode that will enable Windows to boot only with some basic necessary files and drivers & disables everything that is not necessary for the system to boot. What this does is that it restricts any other program, let it be a Antivirus, display driver module, or any application to run at startup and gives us a fair idea of the problem & also let’s us use system restore to restore the computer to an earlier time when your Windows was running fine. Safe Mode also let’s us uninstall some unwanted programs or drivers that might be make the system unstable.

Checking the Display Resolution

Sometimes some bug or human error sets the Windows Display resolution to value that your monitor cannot handle. In this condition the system fails to boot as the monitor is unable to display that particular resolution transmitted by the Graphic/Display Adapter.

To Fix this, Press the F8 key while the system is booting, Select Advanced Boot Options. From the menu that will be displayed select “ Low-Resolution video mode” or “Enable VGA Mode”.

This will set your resolution to a lower value & will fix any resolution based problems. After booting into windows you can set your resolution to the recommended value* refer documentation of your monitor.

To Change Resolution

(Windows 7/Vista)

Right click on desktop and click on change resolution.

(Windows XP)

Right Click on Desktop-> properties –> adapters


Knowing the Error before troubleshooting

It’s always hard to troubleshoot any problem if you don’t know the case of it. To know the specific error you have to disable “ Automatic Restart on System Failure” .

To do that, Press the F8 key while the system is booting & select Advanced Boot Options. From the menu there select “Disable System Restart on System Failure” , this will enable you to look at the error next time it occurs and the computer will not restart automatically.

If It’s a blue screen Error or better known as BSOD, you can follow our this post to resolve it.

Using Start-up Repair

Startup repair is a tool built into Windows 7 to help users fix the common problems that restricts the user from booting into Windows.

To use Startup Repair:

  • Press the F8 key & select Advanced Boot Options. From the menu displayed there select Repair Your Computer


  • When you select this option, the windows will continue to boot to the repair menu which looks like this:


  • Now click on Startup Repair & follow on-screen Instructions.

If Startup Repair does not solve your issue, you can also choose System Restore from the options shown above & restore your computer to an earlier time when it was working fine.

Click on System Restore, Select a Checkpoint from the calendar ( make sure you choose a date on which your computer was working fine ) & follow the onscreen instructions that appear.

Using Backup Restore ( System Image Recovery )

Refer the Screen Shot above, Follow the steps that led to the above menu to appear & then select System Image Recovery.

Follow the Instruction that appear on screen.

Windows Memory Diagnostics

Ram (Memory) plays an important role in the booting procedure. If your RAM is faulty, the computer system won’t boot properly.

To check for errors in your RAM

Refer the Screen Shot above and select Windows Memory Diagnostic. This will check your RAM for errors. If errors are found you can simply get your RAM module replaced.

Finally, If nothing works out – Re-Install Windows

To Install / Reinstall Windows, Follow this GUIDE

Windows 7 Windows Vista Windows XP

No Display : Computer Screen goes black / Hangs / Blinks

After reading this article you’ll be able to understand different reasons for your computer screen ( Monitor – CRT/LCD ) to show no display. It might go black within Windows, blinks, system hangs etc. Here are a few reasons that might be responsible:

  • Faulty Graphic/Display driver
  • Corruption within system file
  • Virus/ related Malicious software
  • Bad Memory ( Faulty RAM modules )
  • Faulty Power Supply (SMPS)
  • Faulty Monitor

Here is How you can try & fix them.

** Check for Loose Cable Connections.

**The Easiest way to fix any system file/driver corruption/ virus problem is to use System restore. This will return your computer to the state where it was working fine.

To use system restore:

Start Menu-> All Programs-> Accessories –> System Tools-> System Restore.

Now select from the available checkpoints & make sure you select the one when your computer was running ok.

The Regular ways

The First the foremost thing to check is your graphics/display drivers. For this the easiest way is to go to your system manufactures website & downloading the latest drivers from there. You can also check Windows update for getting new drivers for this go to Device Manager

Control Panel –> Device Manager

device manager

Click on the display manager and right click on the hardware shown therein & click on update driver software. Windows will then search for the best possible drivers for your hardware and install them.

Note for Windows XP users.

Find out your display card Manufacturer. examples : nVidia, AMD-ATi, Intel, SiS, VIA etc. & downloading drivers from their respective support websites.

Checking for Corruption in system files

To do this, keep a Windows disk at hand & insert it into the CD/DVD drive when prompted.

go to run & type : SFC /SCANNOW   press enter

Windows will now check all you system files & repair if necessary.

Checking for Virus or same DNA malicious software

Use any good quality Antivirus or total security programs available out there.

*my suggestion : Microsoft Security Essentials – free for Genuine Windows users.

Quick resolution if your system is unresponsive due to bad drivers/system file corruption.

If your system hangs just after logon or at the welcome screen, press CTRL+ALT+DEL or right click the taskbar & click on Task Manager.

Now, go to processes tab & look for explorer.exe & end it. Then, go to the Applications tab and click on New task, type in Explorer.exe and press enter.

Note: After this it is essential that you either use system restore & check for new drivers.

Checking for Faulty Memory (RAM)

Many times Faulty/BAD or even incompatible Memory module leads to problems like these. If you RAM module is new, it’s always a good idea to return in back & check your documentation for compatible Memory Modules.

If your system is suddenly behaving erratically, you should then use the Memory Diagnostics tool built into Windows 7. For this press F8 during boot and a menu should show up. Select Windows Memory Diagnostics tool & press enter. This will take a while and run some diagnostic tests on your Installed RAM.

You can also do this from within windows 7. Go to start menu & type : Windows Memory diagnostic & click on the program that shows therein. A screenshot of the program windows is given below:

memory Diad

Windows XP users:  Can use third party tools for Memory diagnostics or if you are ok with opening your computer up, Try Changing the memory modules or if you have multiple modules try taking one out & check for errors, repeat if needed. * Please do at your own risk.

Checking for Faulty SMPS

Note: If you suspect a faulty power supply (SMPS) & you are not confident on opening your computer up (Desktop) you should take your system to a professional & get it checked there.

If you Know what you are doing, Open up your desktop cabinet & try removing any hardware that is optional, E.g DVD drive, PCI Add-on cards, Graphic Card etc. etc. & then check if the problem persists. Replace the SMPS if necessary.

Checking for faulty monitor

If, nothing works out it’s best to check if your monitor is ok, try plugging it into either your laptop or in a friend’s computer system or get it checked by a professional.