Today I updated VirtualBox on my Windows7 system, and suddenly none of my virtual machines loaded.
I got curious, did a google search and found that in the setup some device drivers don’t load properly and you have to load them manually.
Thought I’d list what I did to get past this problem. My latest version of VirtualBox is 4.3.4 r91027 btw.
- Close VirtualBox
- Right click VBoxUSBMon.inf and select install in C:\Program Files\Oracle\VirtualBox\drivers\USB\filter
- Right click VBoxDrv.inf and select Install in C:\Program Files\Oracle\VirtualBox\drivers\vboxdrv
- Open VirtualBox, and load a VM – it should load now