With version 7.2 a new kernel was introduced (5.10). This no longer had the Hyper-V module loaded

Due to a given reason we have to release another update within a very short time. However, the update should only be installed by those who virtualize a Collax server on a Windows server and have the problem of an endless boot loop. With version 7.2 a new kernel was introduced (5.10). This one did not load the Hyper-V module anymore when the C-Server was run as a virtual machine on a Windows Server. As a result, the hard disk was no longer recognized and an infinite loop occurred at boot time. With this update this is now fixed

Further information and details can be found in the Release-Notes of each product.