Wan't to load team fortrees 2 on steam and have a faster Google chrome!

Hello,
I have a Windows 7 premium laptop and have been using it for months now probably almost a year, I have tried everything to make more disk room, clean it up ect by disk cleanup, Norton scans, deleting some unnecessary needed files, like pictures or downloads to get more RAM... Then I thought is it something to do with steam or the games on it? i mean i can hardly load any of them. looks like it's slowing down my internet to!.. It's really driving me crazy and i think my laptop just needs that extra something to make everything go back to the way it was. I can never load team Fortress 2 on there, it freezes. I'm jsut 12 and i'm very bad at all of this.. if you think your capable of telling me what's wrong then thankyou and please be free to take a look at me system information:

Processor: Intel(r) Core(TM) i3-2310M CPU
Installed Physical Memory: 8:00GB
Total Physical Memory: 7:85GB
Available Physical Memory: 5:55GB
Total Virtual Memory: 15.7GB
Avaible Virtual Memory: 13.3GB

Make/Manufacturer : Acer, Microsoft Corporation