vyseznamoval jsem

is due Windows Update client is not updated.

you need start your PC totally disconnected from internet (to avoid Windows Update service connect to Microsoft Servers) and then install this updates manally....

KB3173424 https://support.microsoft.com/en-us/kb/3173424 (pre-requisite).
KB3172614 https://support.microsoft.com/en-us/kb/3172614 (contains the last Windows Update client for now).

once both updates are installed, you can connect to internet again, and Windows Update should start to works normally again.

Treba to pomuze