Constant Crashing Since Last Major Update

Been fiddling around with the computer , following so many suggestions from so many that I don't even recall what all I've done but got that to finally run and got: 

Error: 0x800f081f

The source files could not be found.
Use the "Source" option to specify the location of the files that are required to restore the feature. For more information on specifying a source location, see https://go.microsoft.com/fwlink/?LinkId=243077.

The DISM log file can be found at C:\WINDOWS\Logs\DISM\dism.log
PS C:\WINDOWS\system32>

So... ugh. So frustrating. 

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@puzzlezaddict wrote:

@crystalrainlove  The fact that DISM won't run is definitely a bad sign.  But before you pay anyone else to fix it for you, you can try a repair install instead:

https://www.tenforums.com/tutorials/16397-repair-install-windows-10-place-upgrade.html

The method that uses an ISO file (step 4) doesn't require a USB or any other install medium.  While this doesn't create a completely clean Windows install—some drivers and other basic software are retained—it's the next-best option, and you wouldn't need to pay anything.

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