Booting problem with my HDX 18t

Guys,I have a strange problem with my HDX-when I enter my password,it shows welcome part and stops....I mean that the "circle" is still moving,but it doesn't go any further.It happened after I installed new nvidia drivers-I sleep-ed it,took out hdmi,then when I reconnected and opened, it showed black screen and after a restart my story begun.system restore-no luck,and in safe mode it just shows a black screen!backup it and thinking of restoring it to factory settings-any ideas how to resolve this?

 

I found this I hope it helps,>>This is how you solve this issue, and the real issue is that your HD (hard drive) has a boot failure. This is caused by holding down the shutdown button and/or a power serge. So what you need to do is download Winpe ISO and burn it using nero or your choice of burning software. Then when those steps are completed restart your laptop and run Winpe. Once loaded go to start>CMD then type in the following code chkdisk c: /r . Then let the whole process complete and you should then be able to log into windows again.

If you still can not login to windows there is a tool to figure out if ur hard drive is dieing or id dead. This is called Hirens download that and run it off start up. <<

 

but i can't log in my windows!