BSOD after installing VBox Guest Additions

(../../ntoskrnl/mm/mmfault.c:122) Page fault at high IRQL was 2, address 0

Entered debugger on last-chance exception (Exception Code: 0xc0000006) (Unknown/User defined exception)

kdb:> bt

Eip:

<NTOSKRNL.EXE:8bed3 (ntoskrnl/ke/eventobj.c:166 (KeSetEvent))>

Frames:

<VIDEOPRT.SYS:4a78 (win32ss/drivers/videoprt/event.c:90 (VideoPortSetEvent))>

<VBoxVideo.sys:201c>

<VBoxVideo.sys:1275d>

<VBoxVideo.sys:3dfc>

<ba93ff40>

<ffffffff>

<NTOSKRNL.EXE:8b4ef (ntoskrnl/ke/dpc.c:592 (KiRetireDpcList))>

<NTOSKRNL.EXE:28ca (:0 (KiRetireDpcListInDpcStack))>

<00000060>

<5e5bf465>

Couldn't access memory at 0x8D04EC87!

kdb:>