The sfc /scannow command scans all protected system files and replaces corrupted and incorrect versions with correct Microsoft versions.
Click on the Start button, then click on Run type cmd in the text box.
You will see the following message This task will be created with administrative privileges, click on Ok, then press Enter.
If you are prompted for an administrator password or for a confirmation, enter the password, or click Allow.
A page similar to the one below will open.
Type in sfc /scannow and then press Enter to start the scan. Please notice the space between sfc and the /scannow.
If the scan finds no integrity problems in the first portion of the scan it should stop, to be sure that the scan has stopped wait five minutes, then type in exit and press Enter to stop the scan.
When the scan is finished please post the log of this scan.
To find sfc /scannow log, type cmd in the Search programs and files box,
cmd will appear above the search box under Apps., right click on it and choose Run as administrator, this will open the Elevated Command Prompt. This will look simlare to the image below.
copy and paste the following in the Search programs and files box, then press Enter.
findstr /c:"[SR]" %windir%\logs\cbs\cbs.log >%userprofile%\Desktop\sfcdetails.txt
This will place a new icon on the desktop titled sfcdetails. Click on this to open the log, copy it and paste it in your topic.