Windows hosts: make it work on Windows XP again (5.0.18 regression).Windows hosts: another fix for recent Windows 10 insider builds (bug #15337).Linux hosts: fix for Linux 4.5 if CONFIG_NET_CLS_ACT is enabled (bug #15327).VBoxManage: list processor features on list hostinfo (bug #15334).Guest Control: various bugfixes for the copyfrom and copyto commands / API (bug #14336).Snapshots: don’t crash when restoring a snapshot which has more network adapters than the current state (ie when the snapshot uses ICH9 and the current state uses PIIX3).NAT: rewrite host resolver to handle more query types and make it asynchronous so that a stalled lookup doesn’t block all NAT traffic.NAT: rework handling of port-forwarding rules (bug #13570).NAT Network: support TCP in DNS proxy (same problem as in bug #14736 for NAT).

Storage: several emulation fixes in the BusLogic SCSI controller emulation.Storage: fixed a regression causing write requests from the BIOS to cause a Guru Meditation with the LsiLogic SCSI controller (5.0.18 regression bug #15317).

Ubuntu 20 install virtualbox