My daughter is at college and cannot connect her laptop to her apt. bldg's wifi. (I believe it's overloaded) She has wired access in her room. To access the wireless, should I buy a router, wifi extender, booster ??
wifi extender would be best, you should work with whoever setup the building network to get it configured. A Router you will have issues with getting to the internet as the network in the room will be going though two routers which generally leads to issues.