They can't both be in one partition.
They can both call their home partition "C" when they're running, but it's not the same place.
(see the post here)
Attach a screenshot of your Disk Management and lets have a look at where everything is.
If Windows Update fails you can get free help from MS to fix it
https://support.microsoft.com/oas/default.aspx?&gprid=6527&&st=1&wfxredirect=1&sd=gn
or you can try this
Repair & Fix Windows Updates with Fix WU Utility
I'm giving up thanks for help I'm formating hard drive and starting over by installing Win 7.They can't both be in one partition.
They can both call their home partition "C" when they're running, but it's not the same place.
(see the post here)
Attach a screenshot of your Disk Management and lets have a look at where everything is.
If Windows Update fails you can get free help from MS to fix it
https://support.microsoft.com/oas/default.aspx?&gprid=6527&&st=1&wfxredirect=1&sd=gn
or you can try this
Repair & Fix Windows Updates with Fix WU Utility