My younger brother gave me his windows 'hp stream' laptop. I wanted to reset the whole computer but it told me I needed 3 gb of storage. So I went and started uninstalling the things he had downloaded and the storage never went down. I even deleted EVERYTHING I could plus emptied the recycling bin and nothing change. After I managed to restore it back to the last update I looked at the storage to see whats taking up so much space and it seems to be all system related. I couldn't delete it if I wanted to... what do I do?