ncpl.sys BSOD on Win 7 Machines

Hi,

We're getting seemingly completely random BSODs on our Dell Optiplex 9010 64-bit Windows 7 machines.

The driver at fault according to dumps is ncpl.sys.

We've already been advised to move off Novell SP2 because we had drive mapping issues. We're now on the version suggested: SP1 IR9a. This has solved the drive mapping issue but introduced BSODs.

Any help would be greatly appreciated,

Thanks.