|Cut or copy and Paste should work.|
Cut or copy the item you want to convert, that puts into the clipboard.
Then use Edit/Paste Special and select "picture" it should be JPG.
And since you now have it in your clipboard as a JPG you can paste it into Paint and clean it up if needed.
If Copy/Paste does not work, try doing a Screen Save.
To capture the Screen image
Save the image.