(Although I've downloaded 18 and 19, I'm still using Altium 17.) I recently upgraded my computer, graphics card and moved to Windows 10. Everything has been fine, until I encountered some defective pdf rendering. Missing text, etc. Nothing would fix it, until I disabled "Render Text with GDI+" Dunno if the issue was new COPU, new Win 10, or maybe it as my new low-cost passive heatsink graphics card, an ASUS GeForce GT 1030. BTW, this card seems more than fast enough.