I also downloaded updates using kaspersky update utility which were over 300 mb but still issue is same. So now problem is it says updates in repository updated 3 hours ago (KSC 10) and I manually ran the task of deploying updates (install updates task) to workstations but it still keeps on saying 'Databases are extremely out of date'. So what I do is copy its updates and loads them up on the isolated LAN.
Now we also have same setup with same KSC 10 (with different license) which takes its updates from kaspersky Lab servers via internet. This whole setup is completely isolated from internet and we cannot connect it to internet.