ocean_explorer wrote:I'm having this issue upgrading from 4.1.2 to 4.1.6
Host OS is Win 7. I have many types of guests, but all report the 'cannot access kernel driver' error.
Reboot and repair install makes no impact. Uninstalling and re-installing 4.1.2 also produces the error.
I have checked for 'C:\users\<your username>\AppData\Local\VirtualStore\Program Files\Oracle', but only an empty 'C:\Users\Owner\AppData\Local\VirtualStore' directory.
I have no advice, but can only report seeing the same thing today. A few days ago, I had upgraded from 4.1.4 to 4.1.6 on a Windows XP host and everything started up fine. Now I'm seeing the same kernel driver error message.
I'm going to try uninstallaing and reinstalling down to 4.1.4 or maybe 4.1.2. So far I'm 0 for 3 on this whole virtualbox thing; everything is fine as long as the host is not rebooted, if it is then something new goes wrong every time.