What kind of program can I get to record videos while I am playing? Also what type of movie editing programs are there I can use?

So at the moment, I only have a program which says it’s anti spyware (Webroot Spy Sweeper) and was wondering if it also would protect my computer against viruses (and then I wondered what the difference between an Anti-Virus and an Anti-Spyware is). So if SpySweeper doesn’t protect against viruses should I get an anti-virus program? And would it mess up my computer with two security programs, because I’ve heard that if you have two Anti-Viruses on the same computer it will mess up things.

Thanks for any answers.

I know that installing 2 antivirus programs on a computer can be disastrous.

But is it ok to install an antivirus program (Avast) and spyware removal (Spyware Doctor) on the same computer?

What is the best spyware and antivirus program? I’ve heard negatives of both Norton and McAfee.

Say if I install it, can i run a high risk program without it wreaking havoc on my main computer? Do I have the necessary components for it? And can you recommend any particular program for windows 7 64 bit?