My Dell Dimensio 2400 keeps on hangin up when

Sounds like your computer is lagging while surfing. Really nothing you can do to completely fix it. The older the PC gets and the more advance the www gets there is going to be problems. Reason why, is because no matter how good your internet connection is or how fast that does not matt because if the computer can't support it then its gonna lag and freeze up well surfing. But, the first thing I would do is open up internet explore and click on tools and internet options. Clean out the cookies, temp files and everything that you can on that window. Second run a disk clean up, which is in your start menu, apps and system tools. Let that run and then make sure all little boxes are checked in the window and click clean/ok. That will clean out alot f things that could be slowing the PC down and making it lag. If its still doing what you have explained then I would run a registry cleaner. Can find one online. If all that fails, then I'm sorry but you will need to do some upgrading to your PC. Well good luck.