Hui, Danke für die schnellen Antworten, Wahnsinn hier.
Ich habe aber in der Protokoll Datei noch gültige Updates bis mit dem Zwischenfall der ungewollten “Zweitinstallation”, hier ein Auszug:

07.03.2017 15:37:17	SYSTEM	996	The virus database (VPS 170303-1) was automatically updated.  
21.03.2017 07:45:35	SYSTEM	1288	Automatic rootkit scan was not started as it didn't complete successfully during the last run.  
21.03.2017 08:57:07	SYSTEM	1288	VRDB (Virus Recovery Database) generation was successfully completed.  
11.04.2017 19:57:50	SYSTEM	1284	Automatic rootkit scan was not started as it didn't complete successfully during the last run.  
11.04.2017 21:37:19	SYSTEM	1004	Automatic rootkit scan was not started as it didn't complete successfully during the last run.