I think the problem may have occurred when you ran chkdsk /r and if you prematurely turned off the computer before it finished possibly because the chkdsk /r was acting like it was stuck at a certain percentage finished? 27% ? Did you also lose Admin rights? and was this the reason for the chkdsk /r cmd: run?
Just a thought but try to remember everything you did and share with Chettri the forum moderator no matter how bone headed a thing you think you may have done. All that matters is you give him the whole story. not saying you did not but most people like myself sometimes leave out pertinent info because of the perception of looking like a novice. again, not saying you did this. I did and it lead me to round and round obscure tries at repair and fix that was not necessary and caused me untold running around. again. not saying this was your case. hope this helps you but if not then maybe someone elsewill benefit from my bone headed mistakes I at first "forgot"about. good luck. keep working with Mr Chettri.
BL