SMC keeps on making the computer crash.

Thanks.  I’m first going to try putting in the 1.01.22 firmware (I currently have the one previous because I didn’t like all of the features in the new one), becase some of the threads I read suggested that a firmware update could help.  Then after that will be reinstalling SMC - maybe something went wrong last time?  If neither of those works, I will try what you have suggested; I’ve already recently downloaded and installed Any Video Converter in the hopes that that would help, and AdvancedSystemCare Free and AusLogics Disk Defrag in the hopes that that would make the computer stable enough (they haven’t).  I’m starting to think that maybe this computer is just too old to handle the conversion process.