My Laptop is prompting for me to delete files

Hello,

I have a peculiar problem in my laptop last week.
When i click any files/folder in my laptop. It is prompting to delete that file. if i click yes in delete dialog box. it is deleting. Whenever i clicked any files it is showing the delete dialog box.

Also when i typed anything in notepad and if i use backspace or home button, all the data's that i typed are deleting automatically.

I formated windows two times. even after formating the issue is still available.

Anyone know how to fix this issue or anyone come across this type of issue.
Advanced thanks.

Regards,
Sathish Kumar. B