Intel r pro wireless lan 2100 3b mini pci adapter

What is your operating system?
The wireless card is very old. You can try updating the drivers....
http://www-307.ibm.com/pc/support/site.wss/MIGR-59438.h...

But, it will most likely be hardware limits. You could try upgrading it to a more recent card. But your outdated computer would create a problem.
Also, you could get a card like this, it will connect thru a USB port, it will act as an external wireless card, it could save you some time, and money.
Pick your poison: http://www-307.ibm.com/pc/support/site.wss/MIGR-59438.h...

Hope this helps.