Bootable Ucsinstall Ucos Unrst 8621000014sgn161 Patched -

A Reliable and Efficient Bootable Solution - UCSInstall UCOS UNRST 8621000014SGN161 Patched

Explicitly indicates the image is modified from the original vendor release.
Patches could be:
OVF Template

If you see this error despite using the patched ISO, check your settings. Cisco UC applications are very sensitive to the RAM and CPU reservations defined in VMware. Ensure you are using the exact "Virtual Machine Template" (OVA) specified for version 8.6(2). Important Security Note bootable ucsinstall ucos unrst 8621000014sgn161 patched
1. Technical Write-Up: Cisco Unified Communications Manager (CUCM) Patched Installation