If you are receiving Windows update error 800B0100, then it means that some required file is missing or gets corrupt. Windows Update requires many components to download files successfully but due to manual settings, malicious programs, unexpected shutdown etc system files gets damage or corrupt and due to this issue Windows can’t be updated successfully. When you try to update it stops with the error message that some files can’t be downloaded- Error code 800b0100. There are many types of error codes in Windows but related to specific issues to indicate to the user that you are missing something. Since missing system files are the reason behind this problem , you can fix Windows Update Error 800B0100 by repairing and restoring Windows. System repair and restore both are common manual steps which always helps the users to remove or solve system problems because to repair Windows files you have to insert Windows DVD and restart the system. As you select System Repair from Advanced option it takes a while and damaged files are repaired. In the below paragraph you will get some other manual steps with screen shot which will guide and help you so read the below paragraph and follow the steps.
Cause of Windows update error 800b0100:
Missing or corrupt system files are the cause of Windows update error 800b0100. Sometime Windows driver, registry file, dll file or other system files which are located in System32 are missing or deleted or moved from the default location or path then you may receive Windows Update Error 800B0100. Malicious programs may be the issue of this problem because they are the common issue of Windows trouble. Such type of programs or software are specially developed to damage system files and hack personal data or to disturb users. If you don’t maintain your PC properly and protect from malicious programs then you are inviting for problems.
Manual steps to fix Windows update error 800B0100:
Windows Update error or other problems of Windows can be solved or removed through two processes (Manual and Third Party Tool). First try the manual steps because it is free and can solve the problem. Since system files are missing or gets corrupt so repair Windows or reinstall Windows. It may be that the system files are in a working step but moved from the default location so not supported or found during Windows update. To solve such type of issues go to Start, All Program, Accessories, System Tools, and System Restore. You will be prompted to Yes or No for conformation so click on Yes and select Restore point as default restore and continue with next button. It will take some minutes and restore the system as it was earlier or default.