Can't get new gpu(rx 570) to work

[mincyquir]

I have a prebuilt by ibuypower (rx550, fx6300,asrock760g) just bought an new graphics card (rx570) and cannot seem to download drivers from and. Gives error 1603 but can't find a fix for this. It was working perfectly before I installed the new card. Would I have to go back to the rx550? Could I even get those drivers to download?

 

[dontlistentome]

Here's my procedure when I get a new card.
1. Download the new drivers while still using the old card. There are two reasons for this. One, the computer works. So there should be no problem downloading anything. Two, you need the drivers anyways, so you might as well do it now. There's no reason to wait till later.
2. Uninstall the previous videocard drivers.
3. Shut down the computer and swap cards.
4. Boot up to Windows. Don't let Windows install anything. Using the generic Windows mode, instead install the drivers you already downloaded in step one.
5. Reboot and you're done.

So put the 550 back in and when the computer is working start with step one. By the way, the 570 requires much more power, you have the power supply for it?