Computer shuts down by itself when i press enter key

[tinkstinks_49]

this event started yesterday and I do not think I have done any thing different than before.

 

[AntiZig]

so you hit Enter key and computer just looses power? and stays off? or does it reboot?

Have you tried using a different keyboard?

also, do some searching for malicious software:
Free anti-virus: avast, AVG
Free anti-spyware/anti-malware: malwarebytes, spybot search & destroy