Minidump

[bsplhcb]

I have been working on a PC and it is intermittently rebooting soon after login. Sometimes will be several days between the problem. In trying to track down the problem I spent 2 hours updating drivers and such and rebooted/restarted 12 times before it finally gave me a dump. I have attached the last 3 dump files.
Thanks for your help.

 

[peterdiva]

All the dumps crash at Zonealarm. Update it, as it's way out of date.

BugCheck 10000050, {a9a1c03c, 0, aaa95cb9, 0}
Probably caused by : vsdatant.sys ( vsdatant+20cb9 )
Image name: vsdatant.sys Timestamp: Wed Jul 14 18:10:17 2004 (40F50689)