Windows 10: Cant log into PC, and cant reset with USB or Troubleshoot it.

After I factory reset my pc Windows 10 and when to turn it on I was greeted with my old account that was on the PC and when I try to log in I get a User sign in failed message, and no matter what I do if I try to troubleshoot my pc it requires the password which I am 100% certain it is the right one and im told is wrong, and a USB with recovery files on it will also not work it just loads me back into the login screen, and after trying to access safe mode I get a grey screen with a mouse that I can move and nothing else.

:)

 

Windows 10 infinite restart black screen

Thank you john for all of your help i decided to get the usb my computer came with and factory reset it i didnt have anything that personal or valueable so its ok thanks for the help though i appreciate it

 

Bluetooth is not working — troubleshoot claims I don't even have it

I have done all the following steps:

- installed bluetooth driver from manufacturer
- hit windows update
- updated / uninstalled bluetooth items listed in Device Manager and restarted the PC
- updated / uninstalled USB drivers listed in Device Manager and restarted the PC (USB drivers automatically came back but not bluetooth)
- turned on and restarted all bluetooth support in services.msc
- conducted bluetooth troubleshooting
- conducted hardware troubleshooting

 

router logs DoS attack from a local PC....

Well you did not say that you don't really know what you are doing. It's not a problem of course, but it changes things a little.

It's not even clear if the PC or the router is the problem at this time, so I suggested that you disable some unnecessary things which are usually known to cause many problems, sorry if those were too complicated.

• You could reset some network related stuffz on the PC as a next step. Open an elevated command prompt (run as administrator), and enter the followings on the PC:
  netsh int ip reset reset.log
  netsh int ipv6 reset
  netsh winsock reset
  netsh branchcache reset
  netsh advfirewall reset
  (note: You can export your current firewall rules in the "group policy" before the reset if it's needed for some reason)
  
  
• Btw, Would it be a problem to reset the router to the default settings if the things we are trying will not help? There is a menu point for that called "factory settings" (and also a little hole on the back if you prefer that one).. the Administrator username in the router after the reset would be admin and the password is probably on a sticker at the bottom of the router (special settings needed to go online with your ISP might be also necessary)
  This is not needed now (not yet), but perhaps the source of the problem is at the router and not the PC in question, so we may come to that eventually.

ps.: Do you have a second network card you could test in that PC and a different cable to rule out some hardware issues on the PC side?