Laptop cleanup help

[Spawn of Sephiroth]

Ok, so my computer starting to slow down, and acting w<b><u>ei</u></b>rd. It's aged. I got it brand new 4 years ago, so I know age is prob a big problem, but I'm trying to clean it up and delete unneeded stuff and make room. I stumbled across these in my c drive folder(the files with the t1 stuff), and wasn't sure if i can delete them. or even what they are. And is there a website I can have test my computer for stuff and do like a free cleanup? Thanks


http://i88.photobucket.com/albums/k1...Fetters/tq.jpg