Powershell

Remove-Item -Recurse -Force "C:\Program Files (x86)\ISL Online" -Confirm:$false
Remove-Item -Path "HKLM:\SOFTWARE\WOW6432Node\ISL Online" -Force -Confirm:$false
Remove-Item -Path "HKCU:\SOFTWARE\ISL Online" -Force -Confirm:$false
Remove-Item -Path "HKU:\S-1-5-18\Software\ISL Online" -Force -Confirm:$false

Boost HTTPS

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\ISL Online\AutoTransport\Connect options]
"boost"="wininet-https"
"https"="1"