How much memory (RAM) does it have?
Go to Start > Control Panel > Performance and Maintenance > System
I believe if it is seven years old you are running XP, so that is the directions I provided.
I don't know if you realize, but you can get a whole new laptop with built in Wifi and lots of RAM and CPU power for about $400.
For example, HP Pavilion (G6-1D98DX) for $379.99 at Best Buy this week.
Or a Lenovo 4334DBU 15.6" Windows 7 Home Premium 64-Bit Notebook for $399.99http://www.newegg.com/Product/Product.aspx?Item=N82E16834246483&Tpk=N82E16834246483
Something to think about