Thanks for reaching out, Aleksandra. My name is, Zadee. I'm an Independent Advisor and a Microsoft user like you. I'll be glad to help you today.
If no changes were done and the issue just suddenly happened, I would check the Restore Point in the computer. This saves you time as this allows your computer to go back to a point where the issue has not happened yet. To check your system restore point, follow this:
-Win + R to open run box
-Type: rstrui <Enter>
-Select the restore point date prior to the day the issue occurred
-Hit NEXT, then FINISH
-Wait for the restoration to finish
Let me know if you do not have a restore point saved in the device.
Best Regards,