Repair of Windows 7 64Bit Corrupted Files

I ran the System File Checker and found 3 corrupted files, namely:-

1. AuxiliaryDisplayApi.dll
   
2. System.Data.Entity.Design.dll
   
3. accessibilitycpl.dll.mui
   

I managed to take ownership of the 1st corrupted file, but could not take ownership of nos. 2 & 3, getting the following error message:-

Command:-

C:\Windows\system32>takeown /f C:\Windows\system32\System.Data.Entity.Design.dll

ERROR The system cannot find the file specified

Can anyone advise why this command doesn't work for file nos. 2 & 3?

Also, can I download replacements for the 3 corrupted files? and where from?

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