Error Code 800b0100 is common for all the Windows Operating systems when you try to install the updates. It usually appears when Windows 10 or Windows 7 update system is broken or there are network related glitches.
Reasons for This Error Code 800b0100 :
Usual causes for this error code 800b0100 are communication failure over the internet with Microsoft update servers.
Troubleshooting Steps for Error Code 800b0100 :
Disable the proxy internet connection and try again to install the update.