[Galaxy S III Q&A, Help & Troubleshooting] djdsf:
Hello all, I have a GS3 international GT-I9300

I'll try to go through the story as fast as I can and give as much detail so you guys can understand how I got here.

Bought the phone unlocked, I was stock, I rooted and then I decided to install a new ROM. I went with Resurrection Remix, it was working great. I did this on a desktop back home. They released a new update to RR so I did a OTA update with "Update Me" apparently the thing flashed but it didn't, the phone still worked but NFC wasn't working as well as having lost root access and some other stuff wasn't working correctly, but I lived with it.

I moved to Florida (home is in NY) and I have a laptop with me, for some reason my laptop used to be able to transfer files to my S3, but it wasn't doing it any more after a while. So it would just charge it. I was in a hotel room last week trying to tether via USB but the PC wasnt having it, it could not locate the phone. This week I moved to a different hotel with internet and decided I would flash stock on my S3 to get rid of all these bugs and get root again, I tried flashing stock through recovery and it wasn't going, so I tried flashing RR again (this time downloaded from the site RR site) and it worked. Still no USB connection but I had root back. I looked around my PC and apparently the Samsung drives are not installing or something on my PC. I installed Kies, but nothing, I tried a stand alone driver install and nothing, so I just gave up and bought Mobile Odin pro from Gplay to try to flash again.

Mobile Odin for some reason (I blame it on myself) wasn't finding/flashing stock so again I decided to try and flash RR and see what would happen. It flashed RR and turned on fine. Then I just decided to look for an NFC fix on XDA. Once I found my NFC fix (http://xdaforums.com/showpost.php?p=32029713&postcount=8367) I decided to just copy the files to the system folder, NFC still not working, rebooted and NFC still no working, so I figured I would try to flash the fix through mobile odin seeing as how I can't get my PC to pick up on the USB. I tried flashing but MO just kept bouncing it back and re-booting into RR. Tried again and no flash. So I decided to again try and flash stock. I tried going into Recovery, the phone shut off like it always does, came back on but stayed in the Galaxy S3 GT-I9300 logo and would not move. I shut it off again, tried turning it on again and still stuck on the galaxy logo. Now, if I leave the phone off and plug in the USB, it won't show the battery charging image, it will actually turn straight onto the galaxy logo again and stay there. I can get the phone into download mode, but like I said my pc won't recognize the drivers.

Now, here are my questions:

What happened?

Can this be fixed?

Am I an idiot?

If I can get the drivers installed on another PC as well as Odin (1.85), will the new PC "see" the S3 or are the drivers on the phone deleted as well? (if that sort of thing can happen, idk.)

I'm going to see if I can borrow a buddy's PC and download the drivers as well as odin to try and bring my S3 back to life, I just want to know, what happens if I can't get the other PC to pick it up ether because the drivers on the phone are deleted (if that's a thing) or what I can expect if it is connected.

What are the steps or guides to follow here? I just got it into Download mode and it says on the top of the screen:

ODIN MODE

Product name: GT-I9300

Custom Binary Download: Yes (2 counts)

Current Binary: Custom

System Status: Custom