BIOS/HARDDISK serial numbers disappear on Windows
If the serial numbers of BIOS and HARDDISK HostIDs disappear on your Windows machine, you should check if all the drivers for your motherboard are correctly installed. This issue may occur after you have installed new firmware updates, or replaced generic Windows drivers with vendor-specific ones; for example for better OS performance, or to fix bugs.
This is not an LM-X License Manager error, bur rather indicates that the drivers provided by your software vendor do not work properly after update. To resolve this problem, make sure your drivers are correctly installed. Contact your application vendor for details on how to resolve this issue.
Mitigating the problem
One workaround to this problem is to use the HostID match rating setting, HOSTID_MATCH_RATE when locking a license to multiple HostIDs. This setting lets you specify the percentage required for a successful match, from 0 (no matching required) to 100 (exact matching required). For example, SETTING HOSTID_MATCH_RATE="50" indicates that a 50% or better match must be achieved so that the license can work. This means that you allow your users to run the software if only two out of four HostIDs values are valid.