Once the command prompt is launched, enter the following to use the System File Checker to check your installation for corrupted, invalid, or deleted system files. This option lets you get the exact and complete error message accompanying the Blue Screen of Death by disabling the Automatic Restart option of Windows. Note: this will not fix the boot error you are experiencing in and of itself, but should provide more information that may prove critical in solving the underlying problem.
The option to disable automatic restart on system failure is available from the Advanced Boot Options menu at startup. The instructions below will trigger this behavior, more detailed instructions on disabling automatic restart on system failure are also available in our knowledgebase.
Problems booting up Windows can often be traced back to errors in the bootloader installation or configuration. You can rebuild the BCD using bootrec. Follow these steps:. BCD not getting rebuilt? There is an entire entry in our wiki dedicated to advanced manual repair of the bootloader that can also be followed, if necessary. This pre-boot process ends when a valid system disk is detected.
Windows Boot Manager finds and starts the Windows loader Winload. The kernel passes control to the session manager process Smss. Here is a summary of the boot sequence, what will be seen on the display, and typical boot problems at that point in the sequence. Before starting troubleshooting, you have to understand the outline of the boot process and display status to ensure that the issue is properly identified at the beginning of the engagement. Click to enlarge. Each phase has a different approach to troubleshooting.
This article provides troubleshooting techniques for problems that occur during the first three phases. If the computer repeatedly boots to the recovery options, run the following command at a command prompt to break the cycle:. Check whether the hard disk drive light on the physical computer is working. If it is not working, this indicates that the startup process is stuck at the BIOS phase. Press the NumLock key to see whether the indicator light toggles on and off. If it does not, this indicates that the startup process is stuck at BIOS.
If the screen is completely black except for a blinking cursor, or if you receive one of the following error codes, this indicates that the boot process is stuck in the Boot Loader phase:. The Startup Repair tool automatically fixes many common problems.
The tool also lets you quickly diagnose and repair more complex startup problems. When the computer detects a startup problem, the computer starts the Startup Repair tool. When the tool starts, it performs diagnostics. These diagnostics include analyzing startup log files to determine the cause of the problem.
When the Startup Repair tool determines the cause, the tool tries to fix the problem automatically. Start the system to the installation media for the installed version of Windows.
For more information, see Create installation media for Windows. If your Windows 7 is stuck into an infinite Startup Repair loop after an update, you can try to roll back the Windows 7 update in the Safe Mode since the Windows cannot boot as normal. Access the Safe Mode by pressing the F8 key while the system is booting up.
Then you will see a list of updates you have installed. Find out the most recently installed updates, which most likely has caused the Startup Repair loop,. Then, you can restart your Windows 7 computer to check if the problem has been resolved. If the problem persists, proceed to the next method. This can load the drivers and registry data that worked the last time you successfully started and then shut down Windows 7. Here is how to trigger this action.
Restart your computer. Quickly begin pressing F8 constantly, until the list of boot options appears. The command line chkdsk tool can be used to check, or even repair the drives to tackle file system corruption. To run chkdsk, please do as follow:. Insert your Windows 7 installation disc into the CD drive, and boot Windows from the disk. If the bootloader installation or configuration comes with some errors, the Startup Repair loop could happen as well.
But you can manually attempt to rebuild the BCD boot figuration data , partition boot sectors, and master boot record by running bootrec.
On many laptops, hitting F11 as soon as you power on will get you to the Windows 10 Advanced Startup Options. Booting off an install disk and hitting Next then Repair offers a secondary option. Windows will take anywhere from a few seconds to a few minutes to attempt to fix the problem.
It may not be able to. If you don't actually have a startup problem, it will also say it can't fix the problem. Complete step 1 from the previous method to get to Windows 10's Advanced Startup Options menu. Select a restore point from the menu and follow the prompts. If you have no restore points, you can't use this method.
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