|Is there any tweaks that I can use to increase download speed or could it be that the network card isn't sat on the slot properly or just need to get a better network card.|
No tweaks, if it wasn't seated properly, it wouldn't work, period.
I doubt you need a "better" card, something isn't quite working properly with this one and it could be any number of things. Don't forget, wireless is always a little unreliable and slow and will never work exactly the same from one interface to another, especially when we're talking one make/model to another.
Check to ensure you have the most up-to-date drivers for the network interface. If you don't, upgrade them and see if that doesn't fix the issue.
Earlier on it was so slow, it took 10 minutes to dowload a 10Mb file.
I read this and caught myself trying to calculate how long it would take to download 10 Mb's at 1200 baud..........the speed of my first internal modem. If memory serves me, you're looking at something like 20 hours or more. You kids are spoiled........10 minutes for 10 MB's isn't what I'd call slow considering you're on a home class internet connection.
I would have downloaded the file on one of the "faster" computers and then tossed it across on the LAN to the "slow" one had it been me, and I was in a hurry.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.