[Jaxidian]

After unrooting it, and re-rooting it, the wifi is still not fixed. :erm (1):

Did you "unroot" or did you "revert to stock"? These are two different things. If you don't revert to stock, then you haven't really done it right.

 

[Jaxidian]

I mean, I thought I reverted it to stock, I followed this guide: http://www.androidpolice.com/2011/0...t-the-htc-thunderbolt-and-return-it-to-stock/ which made the version of my phone 1.12.xx
and I had S-ON, but my sd card wasn't formatted completely or anything like that.

Without really reading that, I assume that's what you want and that guide would have reverted your phone back to stock. (and yeah, those guides tend to assume you can format your SD card yourself.)