I have a Fujitsu A530 from 2011. for a couple of days I started to have serious issues with my keyboard. the keyboard is not working properly and is typing in numbers randomly if I try to write down something; especially keep repeating number 9. Then I could hear that it is pressing arrow key by itself as I could hear that sound that the computer makes when you actually don't have a place to use arrow keys. Also I noticed that backspace key is not working properly as well.
I reinstalled the windows like 5 times even changed the hard drive and it is still doing the same thing. Any suggestion please? Shall I change the keyboard? or is a virus?
I also noticed last time I used my computer in the morning that the touchpad is not working properly, for example when I want to click or double something it is not responding sometimes.