For a while now, my PC's CPU% is really high, even when I have no programs running. Everything loads extremely slowly, even though I have more than half my hard-drive space free (250g). Could someone help me figure out what's wrong? Thank you!
While you're waiting for someone who knows how to look at your hijackthis log you could try downloading spybot and microsoft windows defender and running them in that order to see if you've got any malware on your system. It's the most common cause of system resources being streached like that in my experience.
As I suspected, I googled all the processes from your hijackthis log and I found that you PC is indeed rife with malware. If you follow my earlier suggestion of using spybot however I belive that it won't work. There's a bit of spyware on your system which will prevent spybot from running. Please check out the links below, they are info pages that describe the nasty things running in the background on your computer. It may be worth following the instructions to remove lpfw.exe as it's the one that'll prevent spybot from running. Then it would probably be most expedient to simply download spybot and windows defender and run them as I suggested before. Good luck.