Uninstall Virtualbox Completely

This evening I had trouble uninstalling my Virtualbox on my windows machine, the version I use was 3.2. After a lot of trial and error, and I finally run out of ideas. So I went to virtualbox official website, and eventually find out that a lot of people had common problem with me. So this is how I fix it:

1. run the registry editor (press windows + R , type regedit and press OK)
2. in the left pane browse to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion?\DIFxApp\Components -> there should be some sub-keys having GUID names located under the "Components"
3. export the HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion?\DIFxApp\Components to some file (right-click the "Components" key, select "Export", type a file name where you want to export the settings (e.g. C:\foo.reg) )
4. open the exported .reg file (either with notepad or some other text editor or right-click it in explorer and select "Edit")
5. substitute the HKEY_CURRENT_USER with HKEY_LOCAL_MACHINE in the file, save and close the editor.
6. import the .reg file (either double-click it in the explorer or in the registry editor use menu File->Import-> browse to a file, select it and press "Open")

Once I’ve done all the steps above, I’m able to uninstall my Virtualbox.