Find out what else your Windows Server 2008 R2 is doing. The OS itself will probably use a lot more resources then your desktop OS. And if that server is also running additional applications, like a database server or an exchange server, then those processes will also use resources Qlikview can't use. And it's also possible that your desktop machine simply has a faster cpu. Even if the server has more of them they might not all be needed to reload your qlikview document and so will take longer. Or the disks on the server are lots slower. Or the connection to the source data is slower. Could be lots of things.