Thank you very much, but appears UAC due to cmd.exe init
If you can help me with UAC from the next post from this section, i'll be very happy and thankful..
P.S. I think to remain on the idea to use /fwrite and $read on the path where can write with admin rights only (usually C:\ or C:\Windows etc.), to know if mirc.exe is running as administrator or not.
I also agree with the fact to close this thread and thank you very much for your help and attention.
