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Ran Tweaking.com, now Win10 won't accept PIN or PW

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Boggin:
Well that's one thing fixed.

What about performance - is the machine still slow ?

Boggin:
New Win 10 updates can impact start up times but it may also be because of what is in your Start up menu.

Right click on the taskbar and select Task Manager.

If this is the first time you have accessed Task Manager then you'll be presented with a blank window - just click on More details bottom left.

Click on Start-up where you will see all of the items that are enabled and their impact from Low to High.

I have all but my Realtek HD Audio Manager disabled in there.

Click on each and then on Disable - click File/Exit and reboot to see if that improves your start up times.

One thing that can slow a computer's performance is a build up of Temp files.

I use CCleaner at the end of each session but you can also go Start - type %temp% and press enter when it comes up.

If that is highly populated then press CTRL a to highlight then CTRL d to delete.

Click on Yes to confirm then check the box and click on Skip then empty the Recycle Bin.

You will see the size of each file and while they may only be in kbs each, they can mount up.

Mister_One:
The plot thickens. When I run Tweaking.com, at the first screen that checks MD4 Hash, the Hash doesn't match in two files: WinDefend.reg and Repair_Windows.exe. I've tried to reinstall Win!0 four times, using different media. I've used Windows Assistant, two different CD Win10 ISOs, and a USB-based ISO. Each time, after more than an hour of installation, I get "The Win10 installation has failed"! I've managed to speed up boot to about 50 sec., using Task Manager, and I regularly use CCleaner to get rid of temp files and other junk. Is there another way to reinstall Win10 that might succeed where other attempts have failed? (My Dell came with Win10 Pro already installed, sans disks.) Suggestions?

Boggin:
When the repair program's file check fails you simply reinstall the program.

I'm not sure if a cold boot would help before attempting to reinstall Win 10, but it's worth a shot.

If your Dell is a laptop, shutdown then remove the battery and AC then hold the power button in for 30 - 60 secs and then boot up with the install media and try the reinstall again.

If it's a desktop model then just switch off at the wall.

Alternatively, you could contact Dell for a recovery disk which will factory reset your computer when you boot up with that.

There's usually a charge for these.

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