It was ages ago but I used to use Camtasia to create gifs from videos, and I think it let you edit the speed. Not sure how that would work with an already-gif. You might have to screen capture the gif as a video, and then edit it and and produce it as a new gif, which I know sounds nuts, but unless you created the gif in something like fireworks and still have the original file with all the layers (old school gif-making style yo!)….. I also use several iPhone apps that might could do the trick but you’d lose image quality and possibly gain a watermark. 

-val 

> On Nov 13, 2021, at 1:02 PM, charles meyer <[log in to unmask]> wrote:
> 
> Hi my esteemed listmates,
> 
> I understand GIF is considered by many an antiquated and/or non preferred
> format.
> 
> But, I can't open a GIF created by a trusted source with W10 Windows Media
> Player.
> 
> I can open it in Irfanview but is there a way in Irfaview to slow the GIF
> down?
> 
> If not, has anyone used any free, downloadable GIF viewers which enable you
> to slow a GIF down?
> 
> Thank you.
> 
> Charles.