I fail to find again something propably incredible basic <doh>

I think I came across this before, but can't find the solution again:

When starting batch files (CMD, BAT) from Z: (sys:public), on
workstations with the IE7 stuff I get that anoying

"The Publisher could not be verified. ..."

Starting as Z:\mybatch.bat will give that dialog box.

When using UNC \\server\sys\public\mybatch.bat it works fine.

The security settings in IE I haven't found the appropriate setting,
iirc it was something like "allow unsigned progs to be executed", but
that one didn't help (Intranet and trusted sites)

Regards, Rudi.