Windows 10 TH2 Crapping Out At 40%

Davy49 said:

Hi All,I'm also having this same issue on my ASUS T100TA Transformer Book, I had the same issue yesterday while trying to 'upgrade' to the latest home edition via settings. This morning it's once again stuck again @ 40 % with the ' Installing features and drivers' stuck @ 23 % like other user's in here have reported. Just now I ejected my Micro SD Card..hoping something would happen, so far..NOTHING. To me anyway..this issue will give other valued Microsoft user's a VERY negative feeling towards the company. I'm an active Windows Insider, I'm using the most recent version that was offered to me on the 'Fast Ring' on a daily basis..without any issue's. I would have thought by now Microsoft would have got this upgrading process MUCH more refined before offering to upgrade user's computer's !! I'm still waiting to see if my ASUS machine will actually get upgraded properly or not, the good thing is the upgrade 'circle' that shows the upgrade process % appears to still be active..the 40 % is shown as blue, and the 60 % gray area is still dimming like normal. I really wish any other member's in here that are having the same issue would share if / how they got this corrected.David

This happens because Setup ignores any working drivers and tries to update them all from Windows Update. If it cannot find drivers for any device, it stucks. All you can do is disable some devices from Device Manager, so it will not try to update their drivers and it will finish the upgrade. After the upgrade is complete you can enable them again and find drivers for them. I would leave only hard disk, graphics, monitor, keyboard, mouse and disable the others (including the touch screen, use mouse instead). Also disable your Antivirus and run check disk to fix any disk errors.

Guys, I don't know know whether this will help (or gives a clue as to) why the installation sticks at 40% but I removed the micro sd card on my laptop and the install worked. Not sure whether that's a coincidence or not!

As said before, this happens because Setup cannot find a driver for a specific device (and foolishly ignores currently installed driver). Disable some devices from Device Manager to avoid that (see my previous post).

Ztruker said:

That is a known problem (any SD card). The installer should handle it but doesn't.

What about if someone wants to use an SD card as an Temporary storage for installing Windows on a small SSD? They surely haven't thought of that! I have some SD cards which I frequently use in a card reader instead of a USB Flash drive.