Update 10.0.15 to 10.0.16 -> Error 2003 (HY000) can't connect to MySql server.

After Update 10.0.15 to 10.0.16 i get the error: Error 2003 (HY000) can't connect to MySql server.

The MySQL service is not running and not in the service list?
Do the update delete somethin?

After I registration the MySQL service (Mysqld.exe) new, it still works:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\MySQL]
"Type"=dword:00000010
"Start"=dword:00000002
"ErrorControl"=dword:00000001
"ImagePath"=hex(2):22,00,43,00,3a,00,5c,00,50,00,72,00,6f,00,67,00,72,00,61,00,\
6d,00,20,00,46,00,69,00,6c,00,65,00,73,00,5c,00,4d,00,61,00,72,00,69,00,61,\
00,44,00,42,00,20,00,31,00,30,00,2e,00,30,00,5c,00,62,00,69,00,6e,00,5c,00,\
6d,00,79,00,73,00,71,00,6c,00,64,00,2e,00,65,00,78,00,65,00,22,00,20,00,22,\
00,2d,00,2d,00,64,00,65,00,66,00,61,00,75,00,6c,00,74,00,73,00,2d,00,66,00,\
69,00,6c,00,65,00,3d,00,43,00,3a,00,5c,00,50,00,72,00,6f,00,67,00,72,00,61,\
00,6d,00,20,00,46,00,69,00,6c,00,65,00,73,00,5c,00,4d,00,61,00,72,00,69,00,\
61,00,44,00,42,00,20,00,31,00,30,00,2e,00,30,00,5c,00,64,00,61,00,74,00,61,\
00,5c,00,6d,00,79,00,2e,00,69,00,6e,00,69,00,22,00,20,00,22,00,4d,00,79,00,\
53,00,51,00,4c,00,22,00,00,00
"DisplayName"="MySQL"
"ObjectName"="NT AUTHORITY
NetworkService"
"Description"="MariaDB database server"