Windows 10: unusual pc login attempts

Hi. I am running Windows 10 Pro 19044 on an Intel NUC 7th Gen i7The pc consists of two Windows accts and one local acct. The Windows accts use PINs to login, there is no password on the local acct.For the past few mornings, when I boot up and click on my name to login instead of a PIN entry field I'm asked to enter a Challenge Phrase due to numerous incorrect login attempts:"You've entered an incorrect PIN several times.""To try again, enter A1B2C3 below.">Challenge Phrase<There are only four people who have access to this pc family members. They all deny trying to login to my acct, an

:)

 

Strange login attempt on pc

I have quite a strange situation.

A few days ago I came home to my computer being on (when it shouldn't, I did not turn it on)
Being as paranoid as I am I tried figuring out what turned on my pc and why.

Not being unfamiliar with pc's I immediately took steps to make sure it would stop.
One of the steps I took was using event viewer to try and find any clues. What I noticed was my pc seemed to be on more than I want. With strange 'logon events' at very weird times, when I was either away or sleeping in the same room as where the pc is (this for me rules out a family member not respecting my privacy)

Below are screenshot of some of the extreme cases of what seem to be logon attempts, which made me even more paranoid.

Steps I took in the meantime:
- change my windows login code
- ran malwarebytes scan -> found nothing
- ran my nod32 antivirus full system scan -> found nothing
- ran Kaspersky antivirus -> found nothing
- ran Kaspersky rootkit removal tool -> found nothing
- checked powercfg /waketimers, there were none
- manually unplugged internet cable when computer was not in use

Does anyone know if this could be a virus or a hacker login into my pc when I'm not using it, or could it be something I'm overlooking?
More importantly I'm looking for ways I can prevent this.

For the record, I only noticed this when my pc was on last time when I turned it off before, I did not notice anything else like changed files, login attempts on any of my other account, I have 2 factor Auth for most of them.

 

Can't login to new computer w/Windows 10

Hi,

Thank you for your reply.

• 
  Are you able to login to Microsoft Account on Web?
  
• 
  Have you installed any language pack?
  

I suggest you to follow the steps below and check if it helps.

Step 1: I suggest you to select the appropriate language in login screen at the bottom right corner and check if it helps.

Steps 2: Use On-screen keyboard in the login screen to login and check if it helps.

Hope this helps. If the issue remains unresolved, please get back to us and we would be happy to help.

 

Can't login to my windows 10 PC

Hi,

Thank you for your interest in Windows 10.

• 
  Are you trying to login to Microsoft account or local account?
  
• 
  If its Microsoft account are you able to login using the web interface?
  

I suggest you to use the on-screen keyboard and try to login. Follow the steps below:

Click on the Ease of Access icon at the right bottom of the screen and select On-screen keyboard and check if issue persists.

Please get back to us with the results of the above instructions.