Can't delete unwanted tags

Hi all,
I am using Windows Photo Gallery. (tag problem)
The photos have multiple tags. I can't delete unwanted tags.
Can someone please provide assistance with this problem?

I am also having this problem. I have deleted them several times but they are there the next time I open Photo Gallery. I don't know how I got these tags as there were pictures with them that I did not put there. Sure hope someone can help us! Debbie