HI,
I am using centos 6.7

i have installed Virtual Box successfully, it was running fine until the lastest update came
first the error was


Kernel driver not installed (rc=-1908)

The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing

'/sbin/rcvboxdrv setup'

as root. If it is available in your distribution, you should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary.

where: suplibOsInit what: 3 VERR_VM_DRIVER_NOT_INSTALLED (-1908) - The support driver is not installed. On linux, open returned ENOENT.






Now when i am removing with
yum remove VirtualBox*
it failed and gives another error

Running Transaction
--dkms requires a version
error: %preun(VirtualBox-5.0-5.0.6_103037_el6-1.x86_64) scriptlet failed, exit status 1
Error in PREUN scriptlet in rpm package VirtualBox-5.0
VirtualBox-5.0-5.0.6_103037_el6-1.x86_64 was supposed to be removed but is not!
Verifying : VirtualBox-5.0-5.0.6_103037_el6-1.x86_64 1/1

Failed:
VirtualBox-5.0.x86_64 0:5.0.6_103037_el6-1

The kernel error you got when you tried to start VirtualBox was likely because you did not have the kernel headers for your current CentOS kernel installed. CentOS does not install the kernel headers by default.

I can't speak to the removal issue.