This is a really weird problem that I've never even seen before.

When I copy to or from my server share, my computer studders terribly and the data transfers very slowly at only around 12MB/s. By studdering I mean the mouse skips around and all my applications respond very slowly; as soon as I cancel the transfer it resolves immediately. I looked at Task Manager and the CPU is only at ~35% with plenty of RAM free.

This only started semi-recently; before, I had no problems and the transfer speed maxed out the gigabit connection.

I have two hard drives in my computer. When I try transferring files between drives it's fine, but when I copy from the share to either drive or to it from either drive, I get studdering.

I'm running Windows 7 x64.

Anyone have any idea what's going on? Any help would be much appreciated.