My Daughter's Win 7 missing sfc files

Yard Dog said:

Post back after you do that. You should , if done correctly , get a no integrity violations on a SFC scannow. So, let us know how doing it your way worked out.

It will be a while but I will report back.

If sfc is missing then it could be serious infection. I'd run a full scan with Malwarebytes

If you can't insert the file or get SFC to run from the Command Line as shown in SFC /SCANNOW Run in Command Prompt at Boot, I'd do a Repair Install.

However if this is factory preinstalled Win7 its the worst possible install one can have of Win7 anyway, so I'd strongly consider doing a perfect Clean Reinstall - Factory OEM Windows 7