Lotsa Problems

Hi everyone. Have a lot of problems with my computer so I will go one at a time here.
I have a Sony Vaio laptop. The fan seems to turn on every 5 minutes. I think it has to do with the programs running in the background. Not sure. Any suggestions?
Next, I keep getting a low disk space on my C drive. I do a clean-up often and still get the message. Any suggestions?
Thanks.
That's it for now.
HELP!!!

 

I have a sony vaio also.
I first ran the decrapifier first to remove junk software not wanted:

http://majorgeeks.com/PC_De-Crapifier_d5223.html

Use ccleaner to clean disk space:

http://majorgeeks.com/download4191.html

Use default disk cleaner:
http://windows.microsoft.com/en-US/windows-vista/Delete-files-using-Disk-Cleanup