Recently my wife let me know that her Macbook would only work for about five minutes. Now in knowing that her technical knowledge is limited I asked specifically what that meant and she explained that she could visit web pages for a couple minutes and then her browser no longer worked. The computer was still on but no web pages would come up.
After a little troubleshooting I realized the Macbook was out of disk space. She uses Safari primarily so I imagine some temporary cache was filling up and not allowing future web pages to open up. She is running OS X 10.4 so I needed to find out how to clean up the disk a bit. I decided to do two things which included removing GarageBand which she has never used and archiving some of her older music and pictures.