Notice your C: is configured as Boot - different to mine. However I think I've seen that on someone else's...
I'd go for the IIS fix first.
There is one other thing that might be an issue- the disk numbering (see your Disk Management). I've just finished a thread with a user whose PC wouldn't upgrade on that score- fortunately he found a solution.
Try dealing with IIS, and see how that goes.
Make sure you have a current disk image before making any changes just in case.
Please run this log collector and post a zip into the thread for troubleshooting:
https://www.tenforums.com/attachment...-v2-beta06.zip
For Windows updated failures there are Panther logs that have information about the failure message and code. Then using this information the logs can be scanned to find the problems. Sometimes this is tedious to decode the error codes.
Turn off all of the cleaning software: uninstall Ccleaner if it is in use and then reinstall it after the troubleshooting has been completed.
Download and Install: voidtools
This software will make search more efficient.
Overnight attempt an upgrade and after the failure search for Panther folder and post into the thread these files:
setuperr.log
setupact.log
Setupmem.dmp
setupapi.dev.log
BlueBox.log
Rollback
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