eselest kernel shows 4.4.17-calculate as does uname -r. message says module vboxdrv not in directory /lib/modules/4.4.9 and there is no such directory in dir for 4.4.17.
Before updates to newer kernel was using 4.4.9-calculate kernel. Should I go back to 4.4.9 by eselecting it?.
This problem didn't occur on cld15-12amd64 or previous install of cld15-17 on older gatewaypc. Present PC is 2 yr old Lenovo k450e(UEFI w/o fast or secure-boot).Am multi-booting with Antergos and Maui(1). No Windows. Can't use vbox because of module error.

Solved. Had to make sure to pick advanced in grub menu while booting and choose 4.4.17 entry. Reinstall vbox now no more errors. now uname -r matches new kernel. # cl-update ended up removing 4.4.9 kernel too. Thanx.