How to fix this error? Simple, we create a new account and move all the old data into the new account!
Although it seems like you can not type anything or open any folders, we can type the CTRL + R combination to open the command prompt. At this point we write:
The following screen opens
where we can add a new user. Let us remember to assign them the administrator rights by selecting it and PROPERTY -> GROUPS
Now we go out of the current account with ALT + F4 and EXIT. We enter with the new user and under COMPUTER RESOURCES -> DISK C -> USERS we can enter the old account and copy all our data
Let us know if you have solved the problem!