Windows 2003 Server Low Virtual memory

A customer's server keeps running low on virtual memory. There was only 1GB of RAM installed originally and that was getting down to about 130MB free. I added 2GB more RAM to the server. After that there were still problems with the server running out of virutal memory. I uninstalled Mcafee Antivirus because it was using 1GB of virtual memory and over 500 MB of RAM. The system is more stable now than it was before, but after about 4 days it starts saying it is low on virtual memory.

The old IT company that was there had the server set to let Windows manage the virtual memory. It had a max of 3.5GB listed. I set it manually to 4GB but I have not had a chance to restart the server yet because I would like to do it over the weekend. I attached a screen shot of the task manager so you can see the processes that are running. The server has 2.5GB of RAM free but it is still using all available virtual memory.  
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how big is your page file set for?

not to go negitive but do you think you could have a root kit on your server?
nxpsupportAuthor Commented:
The page file is now set for 4GB but I have to restart the server to get set it that and I have to wait until everyone is out of the office for that. Currently Windows is managing it and it says there is a max of about 3.5GB.

I'll check for root kit now and get back to you.
That is really odd,

Your machine only seems to be using 500MB of RAM - I have never seen store.exe use so little!  How many users do you have?

To give you an indication, I have my Exchange server here - 2 users, 1 active, 10GB mail total, maybe 100MB a day, Store.exe is using 600MB (of both RAM and VM) - mad.exe is using so little that it isn't on the first page of processes.

I would run the Exchange best practices analyzer, which will tell you if your memory settings are correct ->

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That is quite a large page file...even with exchange. I would recreate it when you get a chance.  Which is good to do periodically anyway, since they can sometimes become fragmented.
nxpsupportAuthor Commented:
I checked the server for root kits with AVG's Root Kit tool. It did not find anything. Is recreating the page file a possible fix or just a good idea to do every once in a while?
nxpsupportAuthor Commented:
I ran anti-virus from house call and it did find some worms and viruses that were in email that had been filtered out by exchange. There was nothing that was running that would have caused a problem though. I also ran Mcafee's Stinger tool to check too and that did not find anything else.

There are about 10 users on the system so it should not be using up this much virtual memory for that many users.
nxpsupportAuthor Commented:
It was a problem microsoft fixed by  changing a registry key. You'll need to call them if you need a solution.

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That is an extremely useless and vague solution.
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