windows 10 is not updating after rebooting update and restart

Windows has downloaded some update files 1607 to drive C but when rebooting it doesn't even start the update at all it just reboots as normal with the update options still present in the start menu no errors just no update attempted.

I've ran the update troubleshooter and tried checking for more updates but it doesn't stop searching for them.
Would it be safe to delete the update files on drive C and see if windows re-downloads them again maybe?

I've downloaded the anniversary update exe. but it looks like its stuck at 0%

HI, would suggest you separate the issues of download and upgrade and manually download the appropriate iso file (see Tutorial section if you need to know how).

Then burn a DVD, mount the iso or create a bootable USB disk, and proceed with the upgrade.

Note: the iso is useful if
a. you have multiple PCs to upgrade
b. you anticipate reinstalling later or doing a clean install
c. so you have it should you need to do an in-place upgrade repair install (see Tutorials)
d. if used to create a bootable medium, you can boot your PC from it for troubleshooting.

Prior to starting the upgrade:
disable/uninstall any AV
disconnect any unnecessary peripherals
make sure you have enough space on your disk
Run
chkdsk C: /F
and then
sfc /scannow
from an elevated command prompt

You can try doing a clean boot then starting the upgrade.

Hello, great you've got the upgrade done.

I can't tell what it is you're trying to do from that extremely limited information.

What are you trying to delete, and why, why are you using a command prompt, and what command are you using?

Using a command prompt to delete things should be an exceptional case.

Are you using the command prompt from within Windows or from a bootable medium?

Sorry, my crystal ball is currently down for scheduled maintenance....

Hi, you don't need to delete that manually- apparently the reversion period for this is only 10 days if I recall, at which point it will be deleted automatically.

That said, see
Windows.old Folder - Delete in Windows 10 - Windows 10 Forums
(it's always worth checking the extensive tutorial section or sometimes even searching the forum)