Installed BES and now all services shut down error The server was unable to allocate from the system nonpaged pool because the pool was empty.

I installed BES on Server 2003 with sp2.  This server is also running AD DNS DHCP everything was up and running yesterday and this moring i came in dhcp dns and AD was down along with BES.  I am recieving this error
The server was unable to allocate from the system nonpaged pool because the pool was empty.
I have found some information on technet but it was not much help.  Has anyone had the same problem?
dpfindleyAsked:
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Gary CutriData & Communications SpecialistCommented:
Have a look at the reply to this thread:
http://forums.techarena.in/showthread.php?t=379515



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kind4meCommented:
How much free space do you have left on the server?
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dpfindleyAuthor Commented:
I have 5gigs left on the local disk and 60gigs on the partition.  In our district we use lightspeed virus protection which i removed yesterday and the server did not crash last night.  I am currently monitoring the allocation of memory to see if this happens again
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kind4meCommented:
It sounds like something grabbed a lot of space and killed the pagefile.  5 gigs free is not alot of space for your DNS DHCP BES and AD.  You may want to see if you can clean up the drive a little since none of those should be taking all that much space.  i would guess that the 4 servers and the OS should take about 10 - 12 gigs.  

Also can you check the event log for the time that it occured and post anything you find.  An Event ID may help direct us more toward the root cause of the issue.
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dpfindleyAuthor Commented:
Event srv 2019 The server was unable to allocate the system nonpaged pool because the pool was empty

It begins with this error every 30 seconds then starts nose diving.
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kind4meCommented:
http://www.microsoft.com/technet/support/ee/transform.aspx?ProdName=Windows%20Operating%20System&ProdVer=5.2&EvtID=2019&EvtSrc=Srv&LCID=1033

This gives you the list of all the issues that can case your problem.  You know your server better then I, but there were a few articals that looked like they could explain your issue.
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dpfindleyAuthor Commented:
So uninstalling lightspeed antivirus protection solved the memory leak problem.  Thanks for all you help
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