Cisco VPN connection problem - "Function Createfile failed"

Hello, and thanks in advance for reviewing my post!

I am trying to set up a Cisco VPN client on a remote user's laptop and am seeing all kinds of odd behavior.

System details:
OS: Windows 2000 Pro
Antivirus: Symantec Corp. Edition (realtime scanning disabled)
Firewall: Zone Alarm, Free version (disabled entirely at this point)
Cisco client version: 4.04 (also tried 4.7, but it would not install)
Port info: TCP/10000
WindowsUpdate Status: patched, all H/W and S/W running current versions.

I should begin with this system had a bunch of customized software as it used to be in a large corporate network, but I believe I have removed all of it. The user account has full administrative privileges.

When I tried to install the 4.7 client, I received an error midway through. (Sorry, but I didn't take notes on that one...it wasn't an error I'd seen before.) After a few tries, I rolled back to 4.04. 4.04 install went smoothly, but I now receive the following errors from the connection log:

17 17:52:02.310 03/26/04 Sev=Warning/2 CVPND/0xE3400003
Function CreateFile failed with an error code of 0x00000002(DRVIFACE:718)

Thanks again!