The samething is undergoing on my computer, go to start/ searchbar / type ~ right click on commandprompt and run as admin then Enter:
sfc /scannow
you should see the following on-screen messages:
Beginning the system scan. This process will take some time.
Beginning verification phase of system scan.
Verification % complete.
Once the scan has completed you will receive an onscreen message resembling one of the following:
…found no integrity violations
…found corruption but repaired it
…found corruption that it could not repair
Please reply with the completion message that you received.(dont worrie i have the same OS and I'm 64x BIT too)