Comment # 1 on bug 1061745 from Andreas Stieger

(In reply to J�rgen Radzuweit from comment #0)
> Yesterday I had an update on my Leap 42.3 machine with two security updates.

Which ones?

> After they applied to the system

How did you apply them?

> a second update with > 100 packages was appearing and applied. 

Where did it appear, and how was it applied?

> After that the whole system was switched to Tumbleweed and all user accounts
> where unusable.

Could it be that you were using a non-Leap 42.3 repository, e.g. the openSUSE
Tumbleweed repository? Added by yourself or through a one-click install? And
then you ran zypper dup without checking?