SFC Scan Now Cannot Repair Autochk.exe

I have Window Seven family on my laptop.It goes quite well. but doing some maintenance, I noticed that SFC scannow detected a problem.
From the log (sfc detail below) it seems to me that it is autotchk.exe is corrupted, both in Windows and in Windows backup store.I can however do a checkdsk which go fine, and do not detect problem (it seems to often be the case when the autochk.exe is currupted). So it goes well.As suggested on many thread, I redid many sfc scans, reboot and retry (seven times at least) without change. O course I did also many virus and spyware scan, both software and online, an the PC is clean, so it don't seems to be the problemI would like an easy remedy, as I don't want to spend days reinstalling Windows, software and settings, and as everything else seems fine.

1 -I was wondering it the autochk.exe is really to be changed, and if this is the only SFC problem. (I posted scan details)

2 -And if so, is this a way I can just copy Autotchk.exe from another PC running window (32 bits as the laptop, in Ultimate or Starter version (both at hand) and replace it in Window.OR to take it from a friend PC that have Seven Family (exactl like the laptop) And also should I change also both autochk.exe.mui which are in the same file or is it pointless ? Or, if not possible, where and how can I get an clean autochk.exe ?

3 - Or is the whole thing unecessary, and am I better to leave things as they are ?