Please open Notepad and enter in the following:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\mnmsrvc]
"Start"="0x4"
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services\mnmsrvc]
"Start"="0x4"
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet004\Services\mnmsrvc]
"Start"="0x4"
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mnmsrvc]
"Start"="0x4"
Then, click File > Save as...
Save as disablePure.reg to your Desktop.
Choose Save as type... All Files.
Click Save.
Then, exit Notepad.
Double-click on disablePure.reg, and confirm the prompt.
Then, reboot your computer and see if it gives any more issues at Winlogon.