network start server - failure - specified driver invalid

Here's the Command Prompt screen for my network start &
network start server commands - I'm unable to access this
computer via the MS network - It looks like the driver
has become corrupted or inaccessable.
I'm not able to id or find the driver.
How can I find & check and/or reinstall this driver?
Any other thoughts or advice?
Thanks,
Ralph
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Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Ralph Wallacenet start
These Windows services are started:

Application Layer Gateway Service
Automatic Updates
COM+ Event System
Cryptographic Services
DHCP Client
Distributed Link Tracking Client
DNS Client
Error Reporting Service
Event Log
Fast User Switching Compatibility
GhostStartService
Help and Support
Internet Connection Firewall (ICF) / Internet
Connection Sharing (ICS)
IPSEC Services
Logical Disk Manager
Machine Debug Manager
Messenger
Network Connections
Network Location Awareness (NLA)
Norton AntiVirus Auto Protect Service
Norton Unerase Protection
Plug and Play
Print Spooler
Protected Storage
Remote Access Connection Manager
Remote Procedure Call (RPC)
Remote Registry
Secondary Logon
Security Accounts Manager
Shell Hardware Detection
Speed Disk service
SSDP Discovery Service
Symantec Event Manager
System Event Notification
System Restore Service
Task Scheduler
TCP/IP NetBIOS Helper
Telephony
Terminal Services
Themes
Upload Manager
WebClient
Windows Audio
Windows Image Acquisition (WIA)
Windows Management Instrumentation
Windows Time
Wireless Zero Configuration
Workstation

The command completed successfully.


C:\Documents and Settings\Ralph Wallacenet start server
The Server service is starting.
The Server service could not be started.

A system error has occurred.

System error 2001 has occurred.

The specified driver is invalid.


C:\Documents and Settings\Ralph Wallace

What driver is this?

I've just come across this problem and it coincidently coincides with XP
updates.

A system that was working perfectly the day before has a problem the
next ...mmmmmmmmm.

However, I have updated numerous systems to SP3 and have not come
across this issue before.

Anyway, I'm gonna try Ralph's suggestion and copy the driver from
another system. (Windows/System32/drivers/srv.sys)

Thnx Ralph

I've just come across this problem and it coincidently coincides with XP
updates.

A system that was working perfectly the day before has a problem the
next ...mmmmmmmmm.

However, I have updated numerous systems to SP3 and have not come
across this issue before.

Anyway, I'm gonna try Ralph's suggestion and copy the driver from
another system. (Windows/System32/drivers/srv.sys)

Thnx Ralph