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New SBS 2011 server running extremely slow

I just set up a new SBS 2011 server for a client. All we've done is set up users and email accounts on Exchange 2010. (7 users) I don't even have mail coming in and out of it yet. And they have one Inventory APP that is an SQL application and the server is barely usable. It takes 10 seconds to open up a browser on the server and using the inventory app on the workstations is nearly impossible. The server has 3,2G processor and 8G ram. As you can see in the screen shot the Memory is steady at about 6G when essentially idling in the middle of the night. There are no meaningful errors in the logs. Can anyone tell me why this server is running so slow. I can't think of anything to check.
I stopped the information store service to see if the server got any faster and it did not so I don't think its an Exchange problem but I'm nit sure.
SBS2011.docx

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Axis52401

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Here is a screenshot of the processes after a reboot. They only difference from last night is that the w3wp.exe process was over 1G and is slowly climbing.

How do I run the disk speed and memtest you mentioned. I don't have AV installed yet as this server was an emergency replacement for one that failed. Its on the list of things to do but with this problem I don't want to add to the load till I get this working. Also the previous server ran their users on Exchange 2003 and this same SQL app with a lesser machine. processes.docx

PlusIT

looks rather normal. You could start to limit the exhange db cache to see if you get a performance increase: http://eightwone.com/2010/03/25/limiting-exchange-2010-database-cache/

Here's how to check diskspeed (and other things): http://technet.microsoft.com/en-us/library/cc771692(WS.10).aspx

memtest: http://www.memtest.org/ (or hirens boot cd)

PlusIT

make sure the box is up to date. And also check this: http://social.technet.microsoft.com/wiki/contents/articles/small-business-server-2011-build-document-iv-tweaking-the-server-for-optimization-and-customization.aspx

PlusIT

and offcourse make sure drivers and hardware firmware are up to date.