This is a common crash with Zonealarm. Uninstall it and replace it with something else.
BugCheck C2, {7, cd4, 2060002, 8a3a50e8}
Probably caused by : vsdatant.sys ( vsdatant+476f6 )
Image name: vsdatant.sys Timestamp: Fri Aug 22 12:20:21 2008 (48AE3075)