I have a Dell Inspiron N4110. Laptop. That was infected a virus. If i select/double click a file/folder it goes to recycle-bin as delet. I format the C: and setup new win7 it remain same. After some days when i start the laptop it comes BIOS and a beep.
When i disconnected the keyboard from laptop it is ok. I used a USB keyboard functioning ok but F2/F10 key is not functioning to enter BIOS.