Win 10 compatibility?

You are in the Premiere Elements (video) forum.  I'll assume you are asking about Photoshop Elements (photos).  Windows Vista and Windows 7 were current when Premiere Elements version 10 was coded.  We've been through Windows 8 and a few versions of Windows 10.   Add to that all the hardware and CPU changes.  That means that when you put version 10 on a new system you are the "test pilot".  When there are unpredictable results, nobody but you will be able to figure it out.  That said, it might work fine!