If virtualbox stopped to work on windows 10, try the following command:
sc.exe query vboxdrv
If you get the following output:
SERVICE_NAME: vboxdrv
TYPE : 1 KERNEL_DRIVER
STATE : 1 STOPPED
WIN32_EXIT_CODE : 31 (0x1f)
SERVICE_EXIT_CODE: 0 (0x0)
CHECKPOINT : 0x0
WAIT_HINT : 0x0
Try to start vboxdrv
sc start vboxdrv