To manually update the BOOTMGR file, do the following:īoot interrupt Windows 10 by starting your PC and as soon as you see the Windows logo press and hold the power button to force a shutdown. Since the boot error is often caused by a compressed BOOTMGR file, replacing the file is often a good and effective solution.
This solution requires you to rebuild the Boot Configuration Data (BCD). 2] Rebuild Boot Configuration Data (BCD) file # If this does not fix your problem move on to the next option. Run the Startup Repair three different times, because sometimes it takes three runs to fix it. Since this BOOTMGR is compressed error is preventing your Windows 10 system from startup and boot fully to the desktop, the first logical step to take is to, perform Windows 10 Startup Repair. Let’s take a look at the description of the process involved concerning each of the listed solutions. If you’re faced with this issue, you can try our recommended solutions below in no particular order and see if that helps to resolve the issue. However, since the system boot sector code lacks the ability to decompress files by itself, the BOOTMGR file, which is a key part of the booting process, should not be compressed, otherwise, you’ll encounter this error on Windows 10 startup.
File compression is a feature that allows PC users to decrease the size of files, folders, and programs, and reduce disk space usage.
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