vbox升级后遇到Cannot access the kernel driver!

前几日升级了 vbox ，今天打开使用的时候报了以下的错误

Cannot access the kernel driver! 
Make sure the kernel module has been loaded successfully. Failed to open a session for the virtual machine ora10g.
Virtual machine 'ora10g' has terminated unexpectedly during startup.
Details:
Result Code:
E_FAIL (0x80004005)
Component:
Machine
Interface:
IMachine {540dcfda-3df2-49c6-88fa-033a28c2ff85}

解决办法如下：

solution:
before you watch the solutions, please make sure that you reboot your system after the installing.
NO.1
if the problem is produced after the updating, you can reinstall the pre-installer, then reboot your system.
i ususlly repair the virtualbox in this way,but it doesn't work this time, 
so i found this solution:
1.close your internet to avoid the viruses.
2.add to C:\Program Files\Oracle\VirtualBox\drivers\vboxdrv, and found the file "vboxdrv.inf", install it.
3.restart the virtualbox, and the question is solved.
hope your question will be solved.please leave a message if you have any questions.

记录下，免得下次升级后又遇到。