If you are referring to the Internet, there are some easy solutions. Clearing your cache, cookies, and history may help, so try that first.
recommend using a program that will do this for you, called CCleaner, which can be found here: http://www.piriform.com/ccleaner
If you do not want to download software to do this for you, you can do it manually.If you use Internet Explorer 8+:
Click on "Tools
", select "Delete Browsing History...
" and make sure to select temporary Internet files
.If you use Google Chrome:
Click on the settings tab directly under the "X" button in the top right corner, click on "Settings
", click on "Show advanced settings...
", and under the Privacy header click on the button titled "Clear browsing data...
". From here, select whatever applies.If you use Mozilla Firefox 4+:
on your keyboard.
If you use another browser, use a search engine (Google, Bing, etc.) and search "how to clear cache on *insert browser here
Again, this is assuming that you are talking about the Internet. If you are talking about your computer in general, then there are many things you can do, so don't worry.
If you have any more questions, let me know. I'm happy to help :)