Skyrim got deleted after computer restart?

[Jtgsuomi]

So, today I just opened my computer (Laptop). Then I opened game booster to get ready to launch the game. But before that I decided to download a few mods with NMM. I downloaded a few texture mods, the mod which adds more dogs into the game and a whiterun extension. Then I tried to launch skyrim but then the download window appeared.. So, yesterday the game was working but now I have to re-install the game? Why? And today, when I opened my laptop, I attached the wire into the computer and then, the laptop started immediately. And why did this happen? I should always press the power button to start the laptop.

[fullscreen apple]

1. you should probably only add trusted steam workshop mods so as not to break your game.
2. you possibly added them wrong and therefore your games messed up
3. plugged what wire into your computer?

[Jtgsuomi]

I mean the wire which gives the power to the whole laptop.