Well, the following lines were displayed on the console whilst
cygcheck was running. I assume that they weren't written to
the output file.
$ cygcheck -s -v -r > cygcheck.out
/usr/bin/cygrunsrv: warning: OpenService failed for 'DcomLaunch':
Win32 error 5
Access is denied.
/usr/bin/cygrunsrv: warning: OpenService failed for 'pla':
Win32 error 5
Access is denied.
/usr/bin/cygrunsrv: warning: OpenService failed for 'QWAVE':
Win32 error 5
Access is denied.
/usr/bin/cygrunsrv: warning: OpenService failed for
'RpcEptMapper': Win32 error 5
Access is denied.
/usr/bin/cygrunsrv: warning: OpenService failed for 'RpcSs':
Win32 error 5
Access is denied.
Then execution ended and cygcheck.out was written to the disk.
I'm attaching it as a plain text file to this note. I hope it
arrives in good shape.