Click this post fromMiniToolto get these methods to fix it.
Thus, it is important to backup all your data before starting to fix the error.
Your PC is constantly monitored by all antivirus software and the antivirus software tries to block any suspicious activity.

Then cycle your gear after disabling and see if you access your profile without any problems.
Here are the steps:
Step 1:Boot your machine inSafe Mode.
Once in safe mode, press theWindows + Rkeys, typeregedit, and pressEnter.
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Then double-clickRefCountand change the value from1to0.
Step 4:ClickOKto save changes and kickstart your system.
Step 6:Now you should check for any available updates and install them immediately.

Then start your system and test whether the issue is fixed.
If not, you could try the next method.
The steps are as follows:
Step 1:Navigate to safe mode and create a temporary account.

Step 2:Open Microsofts official website and log into the affected account (using your Microsoft ID).
Step 3:Then log back into the affected account.
Step 1:Right-click theWindowsicon, then selectShut down or sign out.

Step 2:Then sign back in the account and use the correct password for login.
Now, you’re able to verify if the problem is solved.
Step 1:TypeSettingsin theStartmenu dialogue box and clickAccounts.
Step 2:Then click theFamily & other peopleoption and selectAdd someone else to this PC.
Step 3:Windows will guide you through the wizard on how to create a new account.
Then click theI dont have this persons sign-in informationoption when the new window comes forth.
Step 4:Select theAdd a user without a Microsoftoption and input the details.
Use the file path listed above to import all the app parameters from the previous.
Then sign in your Microsoft account.
Thats all information about the We cant sign into your account error on Windows 10.