Hopefully, this will help. I’m also on 8.1. I’ve experienced similar today with another coin’s QT. When I installed QT and upon completing the install, letting the program run from the ‘run now’ tickbox, it presents me with a different address to if I run from the program files icon (and a different level of synchronised). Upon closing the program and relaunching it my address had changed, I thought I’d done something silly, but reinstalling the program and following the tick box presented me with the lost address again. So there are two copies of the wallet, and it would seem one is only accessible when launching after installation. Now, I’m wondering, if you run as administrator, as I had to when installing, does it save the wallet into the elevated account’s roaming appdata? And could this possibly be your issue?
*edit* yes it does, running QT clients from the ‘run as administrator’, lands you in the administrator accounts wallet. I guess that makes sense from a logical point of view, but I’ve not seen it mentioned anywhere before.
The coin wallets need to pick up other IP addresses to sync to. This is done through a number DNS references in the code. Such as the forum DDoS attack could effect this temporarily, in unusual circumstances. The usual fix is give some addnodes out, so the client can rejoin the p2p network.
In addition to the block winning, where one transaction can end orphaned because a different correct solution was proporgated to 51% of the network, some block are deemed invalid because the contain confilcting transactions.
In addition to the hash criteria, a block needs to contain only valid, non-conflicting transactions. So the other main task for miners is to carefully validate all the transactions that go into their blocks, otherwise they won’t get any reward for their work!
Thanks for your fixing help post! :) Appreciate that. If your Client is stuck and doesnt load or shows errors maybe it just helps to delete the /roaming/feathercoin folder. (Dont forget to backup your wallet first!) - The client will automaticly recreate this folder and start to download the blockchain again. That should always work.