Can't open texture pack in minecraft?

So. I've factory reset my computer due to a virus.
So I had to reinstall my minecraft.
When I went to reinstall the texture pack through the texture pack option on the game, and it said windows can't find the folder. And to try again.
So I went into my files and into %app% and into roaming and the folder was empty.
I tried to uninstall and reinstall and its still not there.
What should I do to fix it?