Get fraps, its worth the 20 or 30 bucks it costs. But if you want to get something that is free, get OBS(Open Brodcaster)

I agree with advisortw2. OBS is a good screen capture software I use it myself and its really nice.

Bandicam is great for starting out but I think XSplit may offer recording as well

Use Open Broadcaster Software! It was originally made as a COMPLETELY FREE streamer for Twitch but then it added recording support. It does take a while to set up, but you can find many tutorials on the internet to do that. http://www.obsproject.com

Also, check out my tutorial on how to set it up!

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Just use a Fraps 'shared" version.

chickendigbickI really want to start making youtube videos, but I need a screen capturing software (Preferably free). It needs to be able to record sound as well What do you guys use??
Thanks in advance!

Try ezvid, its free, easy-to-use, and it records sound well!

Use bandicam, it's a great program for just a trial version though, just a lousy watermark and a 10 minute limit, still a good trial version.