According to my knowledge and personal experience your hard drive may be damaged. Get it check by an IT professional, they can guide you more...
Facebook has been really active these days, it keeps confirming your identity so that your account doesn't get hack. What options are they...
Pretty interesting thing here
Try reinstalling chrome or opt for another browser and check if the same error occurs ?!
Do you mean your account is hacked ?
Did you tried recovering it through your alternate email address or having code on the given number that you submitted while creating your account ?
THanks Jules and Farhan i got same error yesterday and Jules steps helped me out :)