The Minecraft Laucher Wont Open

The Minecraft Lauch Doesn't Work...
Ive Had Minecraft For About 4-5 Years
It Has No Error Sign...
It Just Doesn't Work.
(Win 10) The Blue Bar Is Under The Dirt Block...
Its Just The Laucher Is Invisable.
I Need Help...
This Happened For About 3 Months And I Want To Play Minecraft.