Windows – Can’t apply update to Windows 10 – error 0xC1900200

Solution 1:

Step 1: You can go to PC settings.
Step 2: Under Update and Recovery options, Select "Refresh This PC".

This refresh will delete your installed programs. This might work.

After refresh it might ask for couple of Windows Update install them

Solution 2: Run media creation tool and do a clean install of Windows 10

Hope this helps.

I no longer believe this answer to be correct! (August 2016)

I believe Enterprise editions do not get the 1511 update because of their type - Enterprise is the version you roll out to Employees of a company; you don't want them upgrading their Windows version (and potentially losing compatibility) without your explicit say-so as the administrator.

If you download the 1511 ISO from MSDN and mount it or burn it to a USB stick, you'll be able to run it from the Desktop and install it without losing any files. This, I think, is the only way for Enterprise users to get the update.