I will be helping you with your computer issue. This type of infection does place the hidden attribute on many of your files but they are typically moved to another place on the computer (away from their original locations). It is very important that you do not run any type of temporary file cleaner tools and do not empty out temporary file directories manually!
Only do what I or another helper requests of you and we should be able to restore the files.
Try booting into Safe Mode and if the screen is still all black, press this sequence of keys to open the Task Manager. Ctrl+Shift+Esc
If this was successful, press File
=> New Task (Run...)
Another window should have opened
Type in explorer
into the text-field and press ENTER.
Next, let me know which operating system you are on so I can give you the next set of instructions.
Or, let me know if you were unable to complete the steps. Give me error messages you may have encountered along the way. Be specific