An update on this for anyone new (sorry for the bold it's jammed on! I pasted in from a Google Doc so don't know why) Paint.Net version at this point in time: Stable release 4.2.12 / May 29, 2020; 15 days ago https://en.wikipedia.org/wiki/Paint.net https://www.getpaint.net/ This is an amazing windows program btw - just wish I’d found it sooner! The IcoCur.dll for creating .ico icons from within Paint.net The DLL worked with the above version of Paint.net on my Windows 10 Pro Version 1903 64bit today. Credit to the DLL developer - great job thanks and to TechnoRobbo of this forum for fixing it to work with later version - great job too thanks. The link below is to TechnoRobbo post March 31, 2016 where IcoCur.dll may be downloaded. https://forums.getpaint.net/topic/927-icon-cursor-and-animated-cursor-format-v37-may-2010/page/13/?tab=comments#comment-514467 I online malware checked IcoCur.dll and it seems fine but make your own judgment on this. Results: https://r.virscan.org/language/en/report/03d4142498934d88486bb6cc2c119bc8 The IcoCur.dll file needs to be placed in the 'FileTypes' folder, rather than the 'Effects' folder. (tnx KetchupKid July 28, 2016) Here: C:\Program Files\paint.net\FileTypes I created a 64 x 64 single icon from a 227 x 222 pixel 32bit 20KB .PNG image and it worked and I left job done. So that's the extent of testing I did. The icon looks great on my Windows desktop. To use just do ‘Save As’ and select ‘Save as type’ .ico file and then during the save process you will be shown some icon options, set those and finish saving. Job done. Enjoy and thanks to all contributions.