Ok, so recently my computer has been making a strange clicking noise. A good amount of clicks and stops for an hour or so and then starts up again. Now, I've heard that clicking on a computer is really bad. I'm unsure where it's coming from exactly. But I think that usually means a hard drive thing. I haven't made any changes to my computer, but I'm still a little worried.
I know it's probably stupid to worry, but I have some important shit.
Should I start backing everything up now before something bad happens?

EDIT: Not too long ago, it started clicking and everything locked up. I restarted and I got a disk read error. Holy shit.
I shut down and waited a bit then tried again. Cannot read system OS or something. I waited longer and finally the computer starts to work again. I know for a fact that this machine is fucked up, now.
What is the best way to back up data? I can't burn CDs because the CD burner went out one day. I'm thinking of uploading just the important shit to megaupload or something so I can download it on a new machine.

This thing probably doesn't have much time left...

I want to know if there are any hazards that can come from running something that has system requirements higher than your computer. An example, Spore. It needs a 2.0ghz and I have a 1.5ghz and it seems to run OK (albeit with all the settings OFF), so I'm thinking of trying some other games on my machine that are a little above what I have.
Are there problems that might pop up?

Alrighty then. Today, I was freeing up alot of space on my machine when I started through other shit. I came across a Temp folder located in C:\Documents and Settings\Shon\Local Settings\Temp
This folder is about 4.5 gigs. That gigs. 
My question to guys: Is it safe to delete all the contents of this Temp folder or are there important anythings? I know, though, that over half of these files are unneeded, but I want to delete all the files inside.

Thanks in advance...

I'm a big fan of open-ended gameplay. Whether it's having no objective and running around somewhere doing pointless crap, or you have a mission, but don't have to do it until you want to.
Unfortunately, though, I'm bored as hell. My computer has too much space and I need some good recommendations for the open-ended thing. (Not GTA. It's fun, but you know.)

What do you guys think?  Any good ones that you can think of?

I recently got Fraps, the wonderful recording program. But unfortunately, it doesn't record sound with RM2K3. Everything else, it does. I have already tried checking 'What You Hear' and the other one, but it still didn't work. Is that just something that happens all the time, or is it just me?
Thanks for the help.