Let's see if this will do it then.
Open Task Manager - File - New Task - type cmd.exe and check the box to run with admin privileges.
When the admin cmd prompt opens, enter these cmds -
dism /online /cleanup-image /checkhealth
If that reports the volume is repairable then follow that with these cmds -
dism /online /cleanup-image /startcomponentcleanup
dism /online /cleanup-image /restorehealth
sfc /scannow
exit
and if they come back clean, see if things work then.
If the sfc /scannow reports it is unable to repair some files then run this cmd before exit -
findstr /c:"[SR]" %windir%\Logs\CBS\CBS.log > %userprofile%\Desktop\sfcdetails.txt
This will put an icon onto the desktop which when double clicked on will display the CBS log in Notepad which you can upload and attach to your reply.
Download/run SFCFix.exe which will produce its own report which you can also post and which may fix what sfc /scannow can't.
http://www.majorgeeks.com/files/details/sfcfix.htmlThat needs a current CBS log to work on and as the CBS log can be volatile, it's best to run that straight after the sfc /scannow.
EDIT - Do any other browsers work ?