Network connections dropping

2 PCs (out of several) are dropping intra-network connections and require rebooting.
I've looked at other threads on this here but can't seem to find a fit to our problem.  

We have WinServer2003 running and several (~8 PCs) running in a small business office.  Only 2 PCs are having this problem, including mine.  We have a consultant I could call in but I thought to try Experts-Exchange first.  I have some PC knowledge ...
The Event Viewer for System is showing several warnings like this:
Error      7/25/2008      7:05:25 AM      W32Time      None      29      N/A      CFI02
Warning      7/25/2008      7:05:25 AM      W32Time      None      14      N/A      CFI02
And this:
Warning      7/25/2008      11:46:26 AM      LsaSrv      SPNEGO (Negotiator)       40960      N/A      CFI02
And this:
Error      7/25/2008      8:03:42 PM      Netlogon      None      5719      N/A      CFI02

But figuring out why these happen and only on 2 of several connected PCs on our domain is a mystery.  We bought about 5 new Lenovos about 8 months ago ... these 2 problem PCs are from this group.  The other new ones and the old ones don't seem to have the problem.

I just updated our WinServer2003 to Service Pack 2 because I figured someone would say I should do this first... but it did not solve the problem -- I had to reboot my PC this morning as I do every morning (and evening).

This problem was sporadic for awhile ... seemed related to when MS-auto updates would happen.  But now it's gone on long enough -- maybe 2 months straight. And the boss's PC is the other PC that has to reboot like mine -- bad luck.  So I've got to get a solution going.  Any clues to this problem?

rlah

Solution: Network connections dropping

Hello Rlah:

I had a fire to put out. Sorry for the delayed response.

What you downloaded was "Time Synchronization Check". it monitors the entire domains W32time. It is a handy tool for troubleshooting,  but not exactly what you wanted. What you will want to download is "Symmtime".

"Symmtime" is a clock that will synchronize your system clock to an outside world time server. I will give you the download link to this, so there is no confusion. Once installed, you might want to uninstall Atomic clock since another person was having problems with Atomic clock not synchronizing the server. So, here we go.

1) download "Symmtime": (to do so, go to this web page. On the right hand side fill out the licensing agreement. This is a free utility made by symmetricom, so no charge and if you elect not to have email sent to you, they will not. So, none of your information will be shared to any other companies. In other words, don't fret in filling out the right hand side of this page)
http://www.ntp-systems.com/symmtime.asp
When done filling out the page, click the download button and you will go to a new page that has a link and a button to download Symmtime. Go ahead and download this.

2) Now we should probably get rid of atomic clock to make sure the two time utilities don't conflict. You can uninstall this in control pannel/Add/remove programs

3)Once downloaded, you will see a white circle with a little blue "S" in the lower right hand side of your screen, by your clock. (in the System Tray) Double click that and let's set up Symmtime.

4) Right click it and you will see the ability to create your own settings. By right clicking:
---a) you can set up the time servers you wish to synchronize with
---b) You can change the way the clocks look
---c) you can set up how often it synchronizes

5) Under each clock it displays what time zone it is in. You can click on that time zone and select your time zone for your time. I think the default is UTC when each clock appears.

6) You can also add clocks from around the world.

Symmtime settings and adding clocks will take a little playing with, but everything can be learned by yourself in a matter of a few minutes.

____________________________________________________________________________

Once symtimme is downloaded. Synchronize with an outside server and set it up to synchronize your system clock. By default, the synchronization happens every 60 seconds.

Once your system clock is synchronized with the outside server, all you have to do are the six steps from above to set the flags up and send time out to your client machines.

Any Questions? Please ask. It really is very simple to set up Symmtime. I understand that the Microsoft article is a bit convoluted, and I can assist at any time.