I am a user of ZA Internet Security Suite and I have a problem. Every so often my PC freezes (about once a day, sometimes more often, sometimes not at all). The problem typically starts as a program becoming unresponsive, but will quickly spread to all other programs and then Windows itself. Even the mouse pointer will freeze, Ctrt-Alt_Dlt will not work and finally any music playing will gradually die away as if a buffer is emptying. The only way out is to switch the computer off and on again, after which the machine will usually continue working for the rest of the day. I have not been able to find any pattern to it.
Now this problem "seems" to have started occuring since I received the ZA 10 upgrade, although I cannot say for sure.
I have used the windows Driver Verifier Manager, but this just causes Windows to blue-screen during bootup. I have used Windbg on the minidump and it is saying there is an issue with vsdatant.sys.
I have attached the analysis below.
Is it possible that the vsdatant issue could be causing my PC to freeze up?
If not, should I be looking to resolve the vsdatant issue anyway and if so, how would I go about it?
Rob Allen

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* Bugcheck Analysis *
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A device driver attempting to corrupt the system has been caught. This is
because the driver was specified in the registry as being suspect (by the
administrator) and the kernel has enabled substantial checking of this driver.
If the driver attempts to corrupt the system, bugchecks 0xC4, 0xC1 and 0xA will
be among the most commonly seen crashes.
Arg1: 00000000000000f6, Referencing user handle as KernelMode.
Arg2: 000000000000016c, Handle value being referenced.
Arg3: fffff98028334b30, Address of the current process.
Arg4: fffff80002fb0375, Address inside the driver that is performing the incorrect reference.
Debugging Details:

PROCESS_NAME: explorer.exe
LAST_CONTROL_TRANSFER: from fffff8000315f3dc to fffff80002cd5c40
fffff880`04749e68 fffff800`0315f3dc : 00000000`000000c4 00000000`000000f6 00000000`0000016c fffff980`28334b30 : nt!KeBugCheckEx
fffff880`04749e70 fffff800`03174ae4 : 00000000`0000016c fffff980`28334b30 00000000`00000000 fffff980`00000000 : nt!VerifierBugCheckIfAppropriate+0x3c
fffff880`04749eb0 fffff800`02f2d210 : fffff880`00000080 fffff880`0474a140 fffff980`0b942c00 00000000`00000000 : nt!VfCheckUserHandle+0x1b4
fffff880`04749f90 fffff800`02fb0375 : fffff880`00000000 fffff880`00000080 fffff980`00636f30 fffff800`00000100 : nt! ?? ::NNGAKEGL::`string'+0x212ce
fffff880`0474a060 fffff880`010af4de : 00000000`00000000 fffff980`0b942cc0 00000000`00000000 00000000`00000080 : nt!ObReferenceObjectByHandle+0x25
fffff880`0474a0b0 fffff880`010beabd : fffff980`0aaaaca0 fffff880`0474a358 fffff880`0474a358 00000000`00000000 : fltmgr!FltCreateFileEx2+0x1ce
fffff880`0474a1c0 fffff880`010c903b : fffff980`0aaaaca0 fffff980`0b942cc0 fffff880`0474a358 00000000`00000080 : fltmgr!FltCreateFile+0x8d
fffff880`0474a250 fffff880`04b30724 : 00000000`00000001 fffff980`1f0b6d38 00000000`00000002 fffff980`29584fb0 : fltmgr!FltvCreateFile+0xcb
fffff880`0474a2e0 00000000`00000001 : fffff980`1f0b6d38 00000000`00000002 fffff980`29584fb0 fffff880`0474a380 : vsdatant+0x8f724
fffff880`0474a2e8 fffff980`1f0b6d38 : 00000000`00000002 fffff980`29584fb0 fffff880`0474a380 fffff880`0474a370 : 0x1
fffff880`0474a2f0 00000000`00000002 : fffff980`29584fb0 fffff880`0474a380 fffff880`0474a370 00000000`00000000 : 0xfffff980`1f0b6d38
fffff880`0474a2f8 fffff980`29584fb0 : fffff880`0474a380 fffff880`0474a370 00000000`00000000 fffff880`00000080 : 0x2
fffff880`0474a300 fffff880`0474a380 : fffff880`0474a370 00000000`00000000 fffff880`00000080 fffff980`00000007 : 0xfffff980`29584fb0
fffff880`0474a308 fffff880`0474a370 : 00000000`00000000 fffff880`00000080 fffff980`00000007 00000000`00000001 : 0xfffff880`0474a380
fffff880`0474a310 00000000`00000000 : fffff880`00000080 fffff980`00000007 00000000`00000001 00000000`00000001 : 0xfffff880`0474a370

fffff880`04b30724 ?? ???
SYMBOL_NAME: vsdatant+8f724
MODULE_NAME: vsdatant
IMAGE_NAME: vsdatant.sys
FAILURE_BUCKET_ID: X64_0xc4_f6_VRFK_vsdatant+8f724
BUCKET_ID: X64_0xc4_f6_VRFK_vsdatant+8f724
Followup: MachineOwner
5: kd> lmvm vsdatant
start end module name
fffff880`04aa1000 fffff880`04b36000 vsdatant T (no symbols)
Loaded symbol image file: vsdatant.sys
Image path: \SystemRoot\system32\DRIVERS\vsdatant.sys
Image name: vsdatant.sys
Timestamp: Fri May 06 06:31:14 2011 (4DC387A2)
CheckSum: 0007EB69
ImageSize: 00095000
Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4

CPU: Core i7 920 OCd to 3.2 GHz
MBoard: ASUS P6T Deluxe
RAM: 6Gb
OS: Windows 7 Home Premium

ZoneAlarm Security Suite version:
vsmon version:
Driver version:
Anti-virus engine version:
Anti-virus signature DAT file version: 1060659328
ZoneAlarm Browser Security: 1.5.311.0
ZoneAlarm ForceField Spyware Scanner:
ZoneAlarm ForceField Anti-Phishing Database:
ZoneAlarm ForceField Spyware Sites Database: 04.155