I have been trying to open Wallet for about a week. And am at syncing blocks 88.26%. It has taken 7 days of almost constantly running wallet to get it to this point. Since my ADA is trapped I am becoming very concerned. Internet speeds are great so not sure what the problem is. Wallet was working fine until around the point where ADA shot up in price and then I could no longer open it.
I had the same problem but with a mac so I can’t help you out I’m afraid, but I saw plenty of people with windows who found fixes whilst I was investigating