How to Clear the Install Files and Start Fresh
Use this method only if you have some experience, These are tips we found online - so there is no guarantee this will work. You can consider calling Microsoft first, if you are having problems. NOTE: If the tips below do not work, we will not be able to help you further - only Microsoft can do that. All we know is that it worked like a charm for us.
First, lets check if there are problems: Run Windows Update, and then look at the log (its a link right on the Windows Update page). If you see error messages for Windows 10 updates, then there might be a problem. Or perhaps you got an error message, during the Windows 10 install.
We had a machine with Windows 7 on it. Yet on the Update log, it was showing attempts to download Windows 10 updates - as if it was already installed. I looked up the error code and found out that some of our Windows 10 installation files might have gotten corrupted.
Here is the solution that worked for us:
FIRST: CLEAN YOUR SYSTEM. Update your virus checker and run it, preferably with a 'boot time' scan. Defrag if needed, and then run ChkDsk, preferably with the 'surface check' to make sure your hard drive is working well and not causing file corruption. I would also recommend uninstalling anything you do not need; the simpler a pc is, the better it runs. Uninstall Flash to add more stability to your PC, and Disable the Flash extension in Chrome. You should be doing this kind of maintenance once a month anyway, on each machine.
Now there are just 2 quick steps to trigger a fresh set of Windows 10 files:
Step 1: Delete the Windows 10 Installation Files:
Go into "C:\Windows\SoftwareDistribution\Download" and delete everything in that folder. That clears out the bad files.
Step 2: Start a fresh, direct download:
Run the command prompt as an administrator. To do that in Windows 7, go to the Start menu, and type CMD but do not hit Enter. Once you have typed CMD, a few inches up the screen you see it listed - so you right-click and choose 'Run as Administrator'. For Windows 8, use the search in the upper right corner; type in CMD, and then do the right-click to run as Administrator - and so on. Once you have a CMD box running as Administrator, run this:
So thats it! Now check if the download starts: Go to your Control Panel > Windows Update and your Windows 10 should start re-downloading from scratch, hopefully without flaws this time.
Once all the files are downloaded, the Windows 10 installation process is fully automated.
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