If the installer cannot generate this instance ID due to offline connectivity (it checks the MetaQuotes ID server), the installer crashes.
If your installer fails to launch or "hangs" during the process, try these troubleshooting steps: Run as Administrator : Right-click the setup file and select "Run as Administrator" to bypass Windows security restrictions. Disable Firewall/Antivirus : Security software like Windows Firewall metatrader 4 windows offline installer fix
3. MT4 Installs But Shows "No Connection" and Won't Load Charts If the installer cannot generate this instance ID