VirtualBox failed to create COM object (workaround)

My computer is Win7 64bit, and roommates at the same time install VirtualBox, her is win8, installed very smoothly. I was more bumpy, after the installation of the open after the problem arises. Tried several methods on the internet can not, finally combined with two ways to get it done. Method One: (cannot solve the problem completely)

① on the icon of the VirtualBox right-click Properties---compatibility;

② the VirtualBox compatibility mode to Win7, such as:

With this method, you can finally open the VirtualBox, but when you start Redhat, the following problems occur:

Method Two: (Not very feasible)

① Run Command Window ("Win+r" key, enter cmd carriage return)
② into the VirtualBox installation directory:

"CD X:\Program Files\virtualbox" (VirtualBox installation directory, depending on the situation)
③ Run command: vboxsvc/reregserver
④ Run command: regsvr32 VBoxC.dll

⑤ Prompt to register DLL successfully.

Because before using the method one, method one can not fully function, then use this method, so do not know if there is no effect, because still can only open VirtualBox, can not start redhat. (However, you do use the prompt to register the DLL successfully) method three:

① Installing the VirtualBox4.3.12 version

In the Forum or blog, see someone said the new version will appear this problem, and VirtualBox4.3.12 version does not seem to appear this problem, downloaded the virtualbox-4.3.12-93733-win.exe, reinstall, or can not open VirtualBox, so I used the method one, changed the compatibility, the results of the problem solved. Conclusion: For Win7 64bit computer can try method one, if not, the method one and three combined together, should be able to solve the problem.

VirtualBox failed to create COM object (workaround)