I'd probably want to know where it is slow.
So I'd try downloading the same file from a different server (or shared folder on a different PC)
Then I'd try downloading from the laptop to another PC.
Basically, I'd want to know if the problem is the network connection generally (i.e. is it connecting via a very slow wireless adapter or similar) or specific to the laptop / server pairing. Or is it the lappie being slow to download from anywhere because it has antivirus that scans each byte 70 times to be sure?
Look for the bottleneck first - then you stand a chance of identifying what is causing it. (Which is probably me teaching my grandmother to suck eggs!