Oracle heeft versie 4.3.20 van VirtualBox uitgebracht. VirtualBox kan worden gebruikt om andere besturingssystemen in een virtuele omgeving op een computer te installeren. Op die manier is het mogelijk om verschillende besturingssystemen op dezelfde hardware naast elkaar en tegelijkertijd te gebruiken. VirtualBox is beschikbaar voor Windows XP en hoger, OS X, Linux en Solaris, en is in staat om een groot aantal gastbesturingssystemen te draaien.
In versie 4.3 van VirtualBox is onder meer de complete virtualisatiecode herschreven, wat diverse problemen heeft verholpen en ook verschillende prestatieverbeteringen laat zien. Verder is er videocapturing en ondersteuning voor ipv6, kunnen diverse virtuele machines die op dezelfde computer draaien nu via het interne netwerk met elkaar communiceren en is er ondersteuning voor multitouchschermen. Deze elfde update bevat verder nog de volgende verbeteringen:
The following items were fixed and/or added:
- VMM: fixed reboot hang of 32-bit Windows SMP guests (bug #13319, #13462)
- VMM: proper Math Fault handling with certain legacy guests (bug #9042, AMD hosts)
- VMM: fixed a Guru Meditation VINF_EM_TRIPLE_FAULT on older CPUs that don't support MSR-bitmaps (VT-x only; bugs #13034, #13125, #13311, #13425, #13426, #13463, #13585)
- GUI: fix 3D overlay window re-parenting issue when VM goes to full screen mode on X11 hosts.
- GUI: fix occasional loss of focus in full-screen mode on X11 host systems (4.3.16 regression)
- GUI: Mac OS X: wizards should have Cancel button (bug #12541)
- GUI: added a global option to prevent automatic raising of the new window by mouse move with multi-screen guests (bug #8878)
- API: accept remote display port 0 as the default RDP port (bug #8534)
- VBoxManage: fixed crash when executing showvminfo command under certain circumstances (bug #13190)
- ACPI: fixed occasional Guru Meditations in ACPI timer code (4.3.18 regression; bug #13521)
- EFI: improved performance of IDE disk access
- EFI: fixed a bug in the EFI video driver which prevented Windows to boot in UEFI mode (bug #12022)
- EFI: properly announce the amount of RAM for big VMs (bugs #11103 and #13211)
- Storage: fixed a crash under certain circumstances when a medium was ejected from a drive attached to the SATA controller without inserting a new medium before pausing or closing the VM (4.3.16 regression)
- Storage: fixed an interrupt acknowledge issue causing hanging guests or slower I/O (4.3.18 regression)
- Storage: fixed broken resume after the VM was suspended due to a full disk if host I/O caching is used
- Storage: fixed a Guru Meditation under certain conditions when using the DevLsiLogic controller with VMs running in raw mode (4.3 regression; bugs #12254, #12655, #12709, #12774, #12886)
- Guest Control: fixed a bug which might lead to a crash during recursive copy
- SDK: Java COM bindings fixes
- iPXE: enable the HTTP download protocol (bug #13628)
- Runtime: do not use a fixed stack size creating temporary threads during initialization (bug #13038)
- Windows hosts: fixed more startup problems on certain Windows hosts due to conflicts with anti-virus software; better error reporting (4.3.14 regression; bug #13187)
- Windows hosts: fixed DirectSound host audio failure under certain conditions (bug #13418)
- Windows hosts: fixed additional cases of 4.3.14 regression whereby AltGr stopped working for some people (bug #13216)
- Windows Additions: preserve guest monitor layout when resizing Windows 7 or newer guests
- Linux Additions: Linux 3.18 compile fixes (bug #13515)