Windows based machines should have no problems playing back avi files unless they are at insane Mb/s playback rates such as you could have if producing uncompressed avi files. Any Windows video player should do.
You have posted under the Movie Studio section of the forum - do you have this program?
What do you intend to do with the AVI format files?
If you want to edit them, are enquiring about which product to use, we need more information to be able to advise you correctly:
Computer specification, see this topic for what is required and please quote processor and graphics card make/model in full, and also what monitor/screen resolution(s) your are working with.
I would suggest you put this information in your profile signature so we do not have to keep asking for it.
A MediaInfo analysis of one of the AVI files will also help - download and install MediaInfo and analyse one of the clips and post the results, see this tutorial on how to setup MediaInfo and analyse a video clip for all the data required.