VirtualBox là phần mềm tạo máy ảo mã nguồn mở dùng cho tất cả các loại hệ điều hành. Phần mềm này càng ngày càng trở nên phổ biến bởi nó có nhiều tính năng, hiệu suất cao, thiết kế theo module và lại dễ sử dụng.
Nó thích hợp cho cả những doanh nghiệp và người dùng cá nhân. VirtualBox có thể chạy trên các hệ điều hành Windows, Linux, Macintosh và OpenSolaris và hỗ trợ nhiều hệ điều hành khách, không chỉ bao gồm Windows (NT 4.0, 2000, XP, Server 2003, Vista, 7), DOS/Windows 3.x, Linux (2.4, 2.6) và OpenBSD.
Hãng Oracle đã thực hiện một số cải tiến đáng giá cho phiên bản VirtualBox 4.1.18-78361
Cụ thể là hỗ trợ hiệu ứng Aero trong máy ảo cài Windows Vista/7, nhân bản máy ảo đã tạo, thêm lựa chọn tạo máy ảo dưới dạng file .VHD để có thể nạp vào phần mềm khác, giữ nguyên tỷ lệ khung hình khi chuyển cửa sổ máy ảo sang chế độ hiển thị Scale (chỉ có hiệu lực trong máy chủ chạy Windows hay Mac OS X).
VirtualBox 4.2.14 (released 2013-06-21)
This is a maintenance release. The following items were fixed and/or added:
VMM: another TLB invalidation fix for non-present pages
VMM: fixed a performance regression (4.2.8 regression; bug #11674)
GUI: fixed a crash on shutdown
GUI: prevent stuck keys under certain conditions on Windows hosts (bugs #2613, #6171)
VRDP: fixed a rare crash on the guest screen resize
VRDP: allow to change VRDP parameters (including enabling/disabling the server) if the VM is paused
USB: fixed passing through devices on Mac OS X host to a VM with 2 or more virtual CPUs (bug #7462)
USB: fixed hang during isochronous transfer with certain devices (4.1 regression; Windows hosts only; bug #11839)
USB: properly handle orphaned URBs (bug #11207)
BIOS: fixed function for returning the PCI interrupt routing table (fixes NetWare 6.x guests)
BIOS: don't use the ENTER / LEAVE instructions in the BIOS as these don't work in the real mode as set up by certain guests (e.g. Plan 9 and QNX 4)
DMI: allow to configure DmiChassisType (bug #11832)
Storage: fixed lost writes if iSCSI is used with snapshots and asynchronous I/O (bug #11479)
Storage: fixed accessing certain VHDX images created by Windows 8 (bug #11502)
Storage: fixed hang when creating a snapshot using Parallels disk images (bug #9617)
3D: seamless + 3D fixes (bug #11723)
3D: version 4.2.12 was not able to read saved states of older versions under certain conditions (bug #11718)
Main/Properties: don't create a guest property for non-running VMs if the property does not exist and is about to be removed (bug #11765)
Main/Properties: don't forget to make new guest properties persistent after the VM was terminated (bug #11719)
Main/Display: don't lose seamless regions during screen resize
Main/OVF: don't crash during import if the client forgot to call Appliance::interpret() (bug #10845)
Main/OVF: don't create invalid appliances by stripping the file name if the VM name is very long (bug #11814)
Main/OVF: don't fail if the appliance contains multiple file references (bug #10689)
Main/Metrics: fixed Solaris file descriptor leak
Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes
VBoxManage: fixed setting the parent UUID on diff images using sethdparentuuid
Linux hosts: work around for not crashing as a result of automatic NUMA balancing which was introduced in Linux 3.8 (bug #11610)
Windows installer: force the installation of the public certificate in background (i.e. completely prevent user interaction) if the --silent command line option is specified
Windows Additions: fixed problems with partial install in the unattended case
Windows Additions: fixed display glitch with the Start button in seamless mode for some themes
Windows Additions: Seamless mode and auto-resize fixes
Windows Additions: fixed trying to to retrieve new auto-logon credentials if current ones were not processed yet
Windows Additions installer: added the /with_wddm switch to select the experimental WDDM driver by default
Linux Additions: fixed setting own timed out and aborted texts in information label of the lightdm greeter
Linux Additions: fixed compilation against Linux 3.2.0 Ubuntu kernels (4.2.12 regression as a side effect of the Debian kernel build fix; bug #11709)
X11 Additions: reduced the CPU load of VBoxClient in drag'and'drop mode
OS/2 Additions: made the mouse wheel work (bug #6793)
Guest Additions: fixed problems copying and pasting between two guests on an X11 host (bug #11792)
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