Error code

Windows 0x800700C1

WINDOWS0x800700C1
System Error Code· A POSIX/system errno returned when a system call fails.

What it means

%1 is not a valid Win32 application..

How to fix it

  1. Redownload the program from the official source.
  2. verify 32-bit vs 64-bit compatibility.
  3. reinstall the application.
  4. run sfc /scannow if a system executable is affected.

Not affiliated with Windows. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.