Windows 10: Can't Login on Windows, Asking for a USB flash drive

My laptop is asking for a password when it usually asks for a pin number. There is no way to switch login options and it's saying I need a USB to change the password, etc. I don't have a USB backup or Windows disk. I've tried to reset the computer using shift/restart...troubleshoot, etc. No matter what I try, it keeps asking for a password or to be signed in as an admin. My computer was acting weird yesterday and wouldn't link my phone to my laptop as usual. It also could be from a new update, but I can't uninstall the update without the password.I have another laptop that I can access and am

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help. USB drive isn't assigned a drive letter.

Any usb flash drive I plug into my computer isn't assigned a drive letter. The physical drive shows in the "safely remove hardware" but it doesnt show up in disk management. I have tried to populate the volume thru the safely remove hardware properties window and it does pop up in the list but it doesn't stay there. This isn't a format or assign a letter problem. It's more complicated then that. Maybe one of the services needed for usb drive management was disabled? Suggestions needed. btw external usb harddrives work fine.

 

USB Flash Drive Not Recognised  

To find what Navy suggest:: Open a CMD window as administrator and type: diskpart list disk (it will list all drives. Identify the USB drive number) select disk n (replace n by the USB drive number obtained with list disk) list part (is there more than one partition?) select part 1 detail part (is it ntfs or Fat32?) exit

 

Installing windows off of a USB stick

Step By Step from vista:
From admin cmd prompt

1. diskpart
1a. list disk
2. select disk 1 (replace 1 with your usb drive)
3. clean
4. create partition primary
5. select partition 1 (replace 1 with your usb drive)
6. active
7. format fs=fat32
8. assign
9. exit

Copy Windows Vista's DVD ROM content to the Flash Drive

xcopy d:\*.* /s/e/f e:\ (d being your vista cd and e being your usb stick)

And that's it, boot off your usb disk