I now have a folder full of .RAR's; but also .Par2 files
Everyone says just open the first part with winrar and then extract it, but as soon as I open up the first winrar file it already gives me a TON of error popups like "this rar is corrupt, this rar is corrupt and this one is corrupt"
And this happens with EVERY single torrent file that has split up parts.
I did put it so that .par2 files always open with winrar, but really, please help me.
I doubt you'll have much luck diagnosing what's wrong with WinRAR, just try using alternative software. In theory it should detect split archives regardless of which part you open or something, but using default settings WinRAR has always managed to extract everything just fine for me. Try restoring the settings to their defaults or something?