Ok so I have an apple mac laptop. Quite an old white one, and I was running out of space on it so I went through everything (usually there are pointless folders on a mac you don't need) and put them in the trash. I realise now that those folders might have been more important than I thought- one was called 'system'. Now my laptop wont do anything after its switched on! It displays a series of pictures again and again and again. These pictures are a folder, a blocked circle and the apple logo.
I did such a stupid thing but is there any person smart enough to help me solve the problem? Thanks for reading this.