The main issues with a laptop, surface or computer are either these problems:
Profile has become corrupt and became a temporary profile
Windows update
Kace causing the signing out issue.
1. Temporary Profile
2. Windows Update causing the issue
Search for windows update history
Then scroll down to uninstall updates
Find the latest update and click on uninstall
3. For the Kace:
To add, if a repair does not work you can replace a registry value to temporarily allow access if you have remote access tools that allow for editing registry without logging in. A reboot is required to take effect.
Reg key:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Value to edit:
Userinit
KACE login process enabled (original, and cause of the issue):
C:\Windows\system32\KUsrInit.exe,
KACE login process bypassed (will allow login, but disable KACE on-login events from occurring):
C:\Windows\system32\UserInit.exe,
Then after logging in you can do a full uninstall and reinstall of the agent or any required tasks.