@Mikaelrask: I’ve had the card for over a year and had no problems with it. I just switched from McAfee to avast 6 last week and had trouble immediately. This saga began at http://forum.avast.com/index.php?topic=83125. Because I traced it down to the secondary display adapter I thought a repost with a new subject was warranted.

@all: Luckily my keyboard is an old PS/2, so will try the memory dump.

I have found a partial workaround as follows: boot with avast installed and the secondary display adapter disabled. After boot, disable all avast shields and enable the secondary adapter. If the shields are not disabled beforehand, the monitor attached to the secondary adapter will not appear in the display properties Settings tab. Once the secondary adapter and monitor are working, restart the avast shields. I just have to remember to disable the adapter again before shutting down, or the subsequent boot will fail.