http://download.cnet.com/ccleaner/?tag=m
The program is absolutely free, safe, and easy to use.
To use, open the program and use the cleaner and registry tabs on the left. Do the scans (which take about 30 seconds each) and delete all the errors it finds. Then, restart your computer or else it will be laggy. Then, your computer and internet should be super fast!My internet is lagging and i don't know much about computers?Have you called your ISP? It could be a problem unrelated to your home network.