I usually won't be telling people this, but this is important. There is a very security update patch that fixes a bug that puts all your files at risk. If you don't want your information leaked, UPDATE!
Check your taskbar. On the right side, you will see your action center, some windows customisation stuff (volume, ect.), and a square with 2 arrows in it, with a yellow dot. Hit that to update.
THIS IS FOR WINDOWS.
After reading this, go on with life, and have a great day,