If you want a clean install, the latest installer has a switch for silent installs. mirc62.exe /S Otherwise just sfx the whole folder and create shortcuts Then import these two registry values with regedit /S mirc.reg Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\mirc\License] @="XXXX-XXXXXX" [HKEY_CURRENT_USER\Software\mirc\UserName] @="XXXXXXXX" All other reg entries, including uninstall, will be made first time mirc is run.