Hi mvissuet,
A normal installation on a server can take up to 5-10 minutes.
Best times to install it are always after working hours on servers.
You might want to inform your IT department, they might have a window during the day when it could be possible.
A client installation looks like the server installation and takes also 5-10 minutes of your time.
Regards,
Erik
Uses Visualcron since 2006.