You can download either AnyDVD or DVDFab. There are free trials for you to test the programs, but in order to use them past the trial, you would need to purchase them online with a credit card.
AnyDVD will not overheat your computer. Period. Don't know where that came from.
AnyDVD runs in the background. All you have to do is start it and insert a disk into your dvd drive. It will do all the work of decryption on its own. The built in ripper is useful for disks with a lot of protection. You access it by right clicking the fox icon at the bottom right of the screen while AnyDVD is running.
AnyDVD is purely a decryption/ripping program though. It will not reduce a large dvd down in size to fit a single layer recordable disk. You can use free software in conjunction with it however. DVDShrink + AnyDVD is a good combination for most disks.
DVDFab is an all-in-one program. It can break encryption, rip and reduce the size of the dvd.
There is still a way to use free tools entirely and make good backups of your disks. It just won't be in one convenient package. DVDFab has a free section, called DVDFab HD Decrypter. It will continue to function as a decryption/ripping program even after the trial expires. You can then use DVDShrink to reduce the size of the dvds if that is necessary, and you can use a free burning program called ImgBurn to burn to disks.
While you have the free trial of DVDFab, you should explore its capabilites and see if it is worth it to have everything contained in one program.
I use AnyDVD HD. I like that it can be used with other programs and it is the only effective decryption program for Blu Ray. So, you have to know what parts are important for your own uses. Which is why you should try the software before buying.
Good luck. If you have questions, just let us know. By the way, don't try to use AnyDVD and DVDFab at the same time.
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