Full Webpage

When i click on a webpage it opens up in a minimum page and i have to click on the box in the top right hand corner to open it up in full screen.

Can anyone tell me how to get the webpage to open up in full page when i first open up the page.

What are the best software to clean up my hardrive i.e get rid of temp files, files let over after i have uninstalled the program.

How to speed my internet connection and my ram.

Are there any software that i can do maths with.