if possible do this..
get a windows disk or bootable disk
boot from that
go to command prompt within that cd
now type this
chkdsk /r x:
x= normally C drive
or from that windows disk you can try to restore pc to an earlier date..
if none of this helps ..
you need to reinstall windows...
the agency, which is handled by me and owned by your company is stopping its services from 2016.06.01 hence, please stop depositing this cheque issued by me.
Not sure though?