Own Driver Certificates

As Admin in cmd:

bcdedit /set testsigning ON

Restart the PC. After login again on the bottom right it should read somthing along "Windows VERSIONNR SUBVERSIONR, TEST MODE"

Open a cmd again as Admin

The next Command creates a new Certificate:
makecert.exe -$ individual -r -pe -ss "my Certificates" -n CN="certmaker" "test.cer" [Enter]

This Command adds the certificate to the local trusted Certificates:
certmgr.exe /add "test.cer" /s /r localMachine root [Enter]

Now on to signate the Drivers
signtool.exe sign /v /s "my Certificates" /n "certmaker" \*.*a [Enter]

Finally the signated Driver can be installed in Testmode.

After that it's time to leave the Testmode again:
bcdedit /deletevalue testsigning [Enter]

Restart your PC again, and the previous unsignated Driver should be correctly installed