I've updated to 8.1.1 and I'll see how it runs with that.
Just a note that my wallet has approx 83,000 transactions so perhaps is one of the largest in those terms (from staking). I'm wondering if I should consolidate it into a new wallet and the lag would go away?
Windows 10, 8.1.0
My client freezes only when running the Bittrex trading tab and then only while it loads the order book from Trex. So it could be that data load and processing of that data causes the client to lock-up while the processing is completed.
Thread related freezing of UI probably just needs the 8.2.1 client to be released and Bittorrent enabled to fix it. I'm pretty sure that would solve the freezing issues.