In the boot options choose a disc drive or USB to boot from, exit from BIOS settings and save changes. This involves getting into your PC's BIOS settings, which can usually be done by pressing the F2 or Del key when the machine is first turned on. The first step here is to set up your machine to boot from an external source - either the original Windows 10 startup disc or a USB. If this doesn't fix the issue, you'll need to take more drastic action and attempt to manually repair the boot process yourself.

Now, take a careful look at the system's boot order and make sure it's set to start up from the first installed Windows drive. You can do this by pressing the F2, F12 or Del keys immediately powering it back up. If the computer still doesn't restart, it's time to get into the core of your machine and access your PC's BIOS settings.

Any of these could be feeding your machine with corrupt data that is preventing its normal startup. However, all you need to solve this issue is a clear guide and some dedicated time.īut if that still doesn't rectify the message, you should remove all externally connected devices, whether you have a USB key connected, a NAS drive or CD/DVD. There are a number of reasons for this fault, such as a failed software update or a serious malware infection. The key issue that needs to be solved is that the PC is unable to access bootmgr and as a result cannot execute the process. Although fixing it can lead to frustration, and take some time, the method is fairly straightforward and doesn't require a huge amount of expertise.

The boot manager normally handles this process, which obviously makes your life a lot easier.Įven though error screens can be very troubling, the 'bootmgr is missing' message is not an uncommon issue.

Without this crucial piece of the puzzle, you would need to manually start up your OS by using the BIOS to manually execute winload.exe. It is necessary for Windows to function properly as without it, you won't be able to automatically load up your operating system (OS). The software that walks you through the startup process comes preinstalled with your Windows device and is called the Windows Boot Manager, or 'bootmgr'. Should I upgrade to Windows 10? How to create a USB rescue kit for your PC Best antivirus for Windows 10

Repair bootmgr windows 7