Version 6.1.26 Update Notes

In VirtualBox 6.1.26, we have made the following improvements:
- VRDP: Fixed a rare crash on older Windows hosts.
- Guest Control: Fixed a regression introduced in VirtualBox 5.2.4 which broke the customizations of the guest user interface.
- Windows hosts: Enabled DirectX 9.0 for all versions of Windows guests which don't have it by default.
- Linux hosts: Fixed a potential hang during boot or a system crash if a USB3 controller has been passthrough.
- Windows Additions: Fixed a problem with the output of the Windows System Information tool.