If your system just rebooted and only to wipe out what you saved to it earlier before the reboot this is a problem with your system profile. A warning message at the notification area explains what the problem is and the step to be taken in resolving it in time. After taking to the step and yet nothing seem to have changed so much while repeating the same process upon reboot. This is usually caused by malicious software that corrupt your system and act to restore your earlier profile.
Image showing notification of logged on with a temporary profile
If you are experiencing such trouble with your system there is no need to look further. In most cases deleting some registry key folders might not solve the problem not until the malicious software is gotten rid off in your computer.
To do that it is necessary to follow this step-by-step instruction to help you forestall it in time.
Image of malicious software removing tool
STEP 1: Scan your system with malicious software removing tools. In this case updated malwarebytes can be handy. On how to safely remove malicious software from your system visit this LINK.
Image showing windows + R key
STEP 2: Press Windows + R key to open 'Run' dialogue.
Image of Run dialogue
STEP 3: Type regedit into the 'Run' and click 'OK' to continue.
Image of a registry editor showing HKEY_LOCAL_MACHINE
STEP 4: At the 'Registry editor' click on the small arrow before 'HKEY_LOCAL_MACHINE' to expand it.
Image showing red arrow point to SOFTWARE
STEP 5: Click on the small arrow beside 'SOFTWARE' to expand it .
Image showing red arrow pointing to Microsoft
STEP 6: Look for 'Microsoft' and click on the little arrow before it to expand it.
Image showing red arrow pointing to WindowsNT
STEP 7: Next click on the small arrow pointing to 'Windows NT' to expand it.
Image showing red arrow pointing to CurrentVersion
STEP 8: Click on the small arrow before 'CurrentVersion' to expand it.
Image showing red arrow pointing to ProfileList
STEP 9: Look for 'ProfileList' and click the small arrow before it to expand it.
Image showing red arrows pointing to folders to be deleted under ProfileList
STEP 9: Right-click on each of the folder under 'ProfileList' and delete it one by one. They are four folders in total. They are: S-1-5-18, S-1-5-19,S-1-5-20 and S-1-5-21-417952329-856730904-1591267763-1001. After that click 'File' and 'Exit' to leave 'Registry editor'.
Image of Windows shutting down to restart
STEP 10: Restart your system for changes to take effect. If you are still experiencing the same problem please, visit this LINK.