So I’m running Vista SP2 on a laptop and have been using comodo firewall 3.x for a while. I just tried installing the standalone firewall 4.x without uninstalling my previous version. When the installation had been running for 10 mins+ I canceled the installation by clicking “cancel”. Now, about 10+ minutes later the installation is still running but with the “cancel” button greyed out. What is wrong? Is the installation usually this slow? Is it safe to ctrl+alt+delete the installation ?