Make sure you have Java installed on your new computer. After that, you will need to read up on setting up Java so that Salem will run here:
viewtopic.php?f=10&t=8388Otherwise, it runs just fine with Win 8.x.
If it's a new PC, you should also make sure you're video drivers are up to date. Many new PCs ship with "factory" drivers or drivers many months out of date and they may not work properly.