You may visit on 24seven Pccare, it provides really useful tips to speed up your PC. So use it, may be it's helpful to you.

I can recommend "Seqoiaview". It scans your hard drive(s) and shows you whats on there, and what is taking up space. It's very useful; it represents the information in a square-tiled pattern.

I understand that the issue is a ping issue, but if it is also laggy, then try it out.

That is a new one for me. file-hippo is your friend, and so is Secunia for the PSI

Piriform
The tools are awesome stuff.
I also use Speccy to check my temps since I have had overheating issues in the past.

I've noticed my computers performance has slowed a bit recently also and was wondering of some cleaning programs. I've heard of spybot but not of the other two, I'll have to try them out and see if it helps. Thanks for the tips!

Piriform is my favorite company!
Love using CCleaner and Defragler.
CCleaner deletes temporary internet files as well, so you should be alright with the default settings.
And be sure to defrags of your hard drive every month. It will help out a lot.

Spybot is an amazing lil program Smink, I think you'll like it a lot.

Run something like CCleaner and Defragler. Run them in that order, and repeat running defragler until you are not getting much change. Also run spybot to check for spyware and other junk, and delete all of your temp internet files periodically. Nice little goody to play with (for windows) is windirstat to see a visual of your file structure by size. Make sure that you enable unknown and blank space though so you don't freak out. Unknown is usually system restore points. Also, run a registry cleaner (CCleaner can do this) to get rid of junk left over from when you do uninstalls. Think that is all of my non-hardware change related advice. If it becomes un-bearable, backup files and reinstall windows after reformatting.

More RAM, a disc defragment, or just uninstall some stuff, and try not to put to many games on it

New Graphics card will do the trick .. More RAM.

Mhhh, To make it faster i suggest putting a motor on it and attach wheels to it

also, get a GOOD virus/malware checker (I like avast! it's free) and do a boot-level scan. if your system's being hijacked by a virus, it can account for the crappy pings. Also, check the physical connections of your cables (if you're using them.) If you're wireless, check and see if there are any appliances that could be emitting radio frequencies near your computer.

Still it cant hurt to do a overnight- Defragment/disc cleanup

For Internet usage: Get better internet
For Offline usage: Overclock the computer, don't know what it is? Google it

Well, is what you're experience actual connection lag with your ping or is the computers performance itself running choppy? These are generally two completely unrelated issues where a high ping isn't going to make your framerate drop and programs run slower, it'll just mean the information you receive will be behind what everyone else receives. While your computer running slowly and choppy generally won't effect your actual ping either. One is related to the quality of your connection and the other is related to your hardware and software itself.

Just downloading and installing a game isn't really going to effect either of these either since a game isn't going to be running constantly and will only effect your computer and/or connection when you're actually playing it. Otherwise it's just idle inactive data on your drive like any document or picture you might have on there. The only way a game or other installed software is going to have this kind of effect is if it's running all the time for some reason whether you're using/playing it or not, or if a virus/malware came along for the ride.