i stoped a file but now wont resume!

hi, well i hope someone can guide me to solve this; i stoped a pair of files for about 10 mins then i tried to resume them on the start button but it doesn’t work, i tried to doing a right click and start but is the same no resuming files, i hope i can rescue these downloads because they are large and i have already spend like a week (day and night) to have the half of them, so i hope someone can help me, thanks.

there seems to be a problem with your computer and you may need to restart/shut down

as long as you have the file partial, you wont lose what you have downloaded so far so just keep trying to resume it after a while