User's home folder mapping and black wallpaper issues

Hi.

I need some help. I work in a school and we have an issue with the student's (win10) PCs . They log in with autologin, but the users home folder doesn't mapping ... although with the 2nd restart it appears. I found this solution, but nothing changed. 

https://social.microsoft.com/Forums/en-US/8eb33fdb-5689-4691-abe6-90f9cd4499a6/how-to-allow-a-computer-time-to-get-a-network-connection-before-running-a-startup-script-without?forum=winserverGP&fbclid=IwAR0Mz_0UgK-f9cDBU1NHoEf5yJXj__onHxcGw0fixD3OTT7Wlv4wZBng24Q

and we have another problem. the wallpaper only applyes in the 2nd logon just like the home folder. We have a GPO for that. The first logon the user see a black background. I've created a GPO to delete the cached blank wallpaper. C:\Users\xxxx\AppData\Roaming\Microsoft\Windows\Themes\CachedFiles\..... It works, but when the PC-s down for a day the blank wallpapers reappear.