My friend gave me a laptop. He baought it 3-4 years ago and now lots of problem suddenly occuring. 1. When I try to open "/" key filled password box. I think this is keyboard problem. "/" key is just above "8" number key. 2. When I create a partition it starts to filling automatically. It has 1 TB hard disk. C drive has 250 GB of storage but second partition that started to fill automatically has 650 GB but all space is taken within few hours. Don't know what to do. This is even happening after deleting all partition and installing new Windows 10. Currently it has Windows 8 Single Language 64 Bit. 3. Computer become very slow everytime I on it. After keeping it on for few minutes (10-15 minutes) it works normally. Model: Lenovo Ideapad Z500 Touch. Somebody please help. Thank You.