excel 2007 saves files very slowly to a mapped network drive

[HipHoper]

Hi Ferrit,

It's just a file server for an sql express database and office files, nothing fancy.
It's a 4 year old "server" working with windows 7 pro x64.
It's an office that had 7 computers at the time I've built it and up until now they didnt even used passwords until the latest security request from one of their biggest clients.
It was a waste in this case to spend a 1500-2000$ on server hardware and another 1500$ on windows 2008 server. It ended up around 800$ for this computer including OS.
half year ago I've replaced raid 0 set to bigger 2x1tb seagte drives,Upgraded cpu from amd x2-250 to phenom 2 x4 965 with arctic freezer pro 2 cooler, Changed psu to a new HEC 400W one and replaced external hard drive just to freshen it up.
I like to keep things simple. Better for me - Usually also better for the client.