VirtualBox 4.1.20 Build 80170 Available For Download

VirtualBox 4.1.20 Build 80170 is now available for download. This update is a maintenance release which contains a number of bug fixes and several stability improvements over the previous release. The full details about what changes are in this build are available in the "What's new in VirtualBox 4.1.20 Build 80170" section.

Overview
VirtualBox or Oracle VM VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL).

As of version 4.0, VirtualBox introduces the Extension Pack mechanism which allows Oracle and 3rd parties to deliver additional functionality on top of the standard Open Source product.

Presently, VirtualBox runs on Windows, Linux, Macintosh and OpenSolaris hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista, Windows 7), DOS/Windows 3.x, Linux (2.4 and 2.6), Solaris and OpenSolaris, and OpenBSD.

Download VirtualBox 4.1.20 Build 80170
The links in this section correspond to files available for VirtualBox 4.1.20 Build 80170. Download the files appropriate for you.

What's new in VirtualBox 4.1.20 Build 80170 (August 20, 2012)
This version is a maintenance release. The following items were fixed and/or added:
  • VMM: fixed a crash under rare circumstances for VMs running without hardware virtualization
  • VMM: fixed a code analysis bug for certain displacement instructions for VMs running without hardware virtualization
  • VMM: fixed an interpretion bug for TPR read instructions under rare conditions (AMD-V only)
  • Snapshots: fixed a crash when restoring an old snapshot when powering off a VM (bugs #9604, #10491)
  • VBoxSVC: be more tolerant against environment variables with strange encodings (bug #8780)
  • VGA: fixed wrong access check which might cause a crash under certain conditions
  • NAT: final fix for crashes under rare conditions (bug #10513)
  • Virtio-net: fixed the problem with receiving of GSO packets in Windows XP guests causing packet loss in host-to-VM transfers
  • HPET: several fixes (bugs #10170, #10306)
  • Clipboard: disable the clipboard by default for new VMs
  • BIOS: the PCI BIOS was not properly detected with the chipset type set to ICH9 (bugs #9301, #10327)
  • Mac OS X hosts: adaptions to Mountain Lion
  • Linux Installer: fixes for Gentoo Linux (bug #10642)
  • Linux guests: fixed mouse integration on Fedora 17 guests (bug #2306)
  • Linux Additions: compile fixes for RHEL/CentOS 6.3 (bug #10756)
  • Linux Additions: compile fixes for Linux 3.5-rc1 and Linux 3.6-rc1 (bug #10709)
  • Solaris host: fixed a guru meditation while allocating large pages (bug #10600)
  • Solaris host: fixed possible kernel panics while freeing memory
  • Solaris Installer: fixed missing icon for menu and desktop shortcuts

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