I have 15 users on my Windows 2003 32 bit terminal server and it only has 4 GB's of RAM. Ever since upgrading to Office 2007 the server will lock up.. It will run for 2-3 weeks before this happens. Prior to it crashing to notice that the memory allocation is at 5.3 GB's of RAM.. So.. I guess it's safe to say that I need more RAM. Now, as I understand I can performa an inplace upgrade to Windows 2003 Enterprise 32 bit and utilize PAE which in return will utilize the 8 GB's of RAM I plan to allocate to this server. With that said... Will PAE allow all my applcations to use up my 8 GB's of RAM or does the application have to be designed for PAE and only that application will utilize anything after 4 GB's?