This could be one of many things. I would start here.
open the portal - click on "version" and scroll all the way down. this way you can get a good look at what the appconfigs are set to.
if you don't know what the defaults are, install a base copy on your sql server and do a database compare.
I'd try to find out what (if any) customizations are done. it has to be either the hardware, security or customization...