Bluescreen when upgrading to openvpn-2.0_beta6

I just upgraded from OpenVPN 2.0-beta3 to 2.0-beta6, without 
uninstalling beta3 first.

The installation seemed to almost finish. I got the "Install TAP driver" 
twice, but sometime after that I got a bluescreen with this message:

*** STOP: 0x0000007E (0xC0000005,0x805B3054,0xF8936AFC,0xF89367FC)

After a reboot everything seems to be working as it should though.

I did a default installation of OpenVPN.

I'm running Windows XP (English).

I've had XP SP2 installed but has uninstalled previously.
I've recently (after OVPN 2.0-beta3) installed ZoneAlarm 50_590_015.

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