Hey there @jikkejikke!
That sounds like a black screen of death. This occurs when your operating system is corrupted or damaged to a point where the computer can no longer boot. However, despite the name, your computer still has plenty of life left in it. You will need to reinstall your OS in order to return functionality. If you have a current backup of your computer and if you have a recovery disc, you can just pop that in and follow the directions to reinstall Windows. If you don't have a current backup there is a way to (possibly, not certainly) recover your data. Just follow [guide|51144|this guide|new_window=true] to boot Linux from a flash drive or DVD. When you get to step 3, click "Try Ubuntu" and it will open up to a desktop. Use the file manager program to copy all your files to an external drive. It is possible that your hard drive is corrupted to a point where your data is unrecoverable; keep a current backup! If you don't have a recovery disc, follow [guide|89181|this guide|new_window=true] to create Windows recovery media.
Good luck!