There are three types of options:
1, first in the task Manager to switch off all VirtualBox process, and then into the C:\Users\Administrator\VirtualBox vms\ will be the corresponding guest folder to change the name of the guest, and then re-open it, you will find that can not open, Then turn off all the VirtualBox processes, change the guest name back, and then the guest will be able to use it smoothly.
2. Open BIOS (depending on what computer you are) BIOS Setup Utility-"Config ==> CPU ==> Intel (R) virtualization Technology (if you're not using Intel's processor, it's something else with the Virtualization Technology option) ==> set to Enabled
3, in the virtual machine settings to adjust the number of CPUs to 1.
4. Use the lower version of VBox to solve the problem
Although it is said that we have a plan to repair the high-version VBox bug, but this procedure is more complex, if the user can accept the use of stable version rather than the latest version, Then you can try uninstalling the installed vbox software after installing 4.3.12, after you install this version of the VBox virtual machine, you will not be able to create a new task when running the virtual machine operating system
Summarize
1. The number of CPUs in my virtual machine settings is 1
2. Finally, in the fourth way, to search for information on the Internet the cause of this error may be due to its own machine is Windows7 flagship and virtual machine conflict caused, originally 4.3.18 to 4.3. After 12 normal
Oracle VM VirtualBox startup new virtual machine wrong--cannot open a new task for the virtual machine xxxx computer