Cleaning "free space" on hard drive?
 

My laptop is nearly two years old now, but still runs quite well and is well looked after, so am looking to keep it for another while.

The problem is that it is gradually getting slower and has, at times, run out of memory and programs have frozen because of it. I was advised to clean the free space on my hard drive, but have no idea which program to use and how to go about it.

The problem is I have no CD to reboot windows and no desire to reload the operating system or anything like that and I also want to keep all my CURRENT programs and documents on my computer.

Is there any program that anyone has experience that could help me get a bit more performance out of my PC?

*Just saw stickied topic with a few options, can ignore this topic!