Steps required for Enterprise Console 4.5.1.0 to Enterprise Console 5.1 upgrade

Thank you!

If the link in NAC is not available when you press on it in Enterprise Console

than it means it is not installed although it is shown in Menu on left side of Console?

I thought to start upgrade end see what are system requirements as you write,

but Console is installed on domain controler therefore i want to avoid as much

problems as it possible. http://www.sophos.com/en-us/products/endpoint/endpoint-protection/components/management-console/system-requirements.aspx  I ask you about NAC because of 2 GB*

written for * Additional memory and disk capacity required for installation of NAC Manager

Server where Console is installed is Windows Server 2003 and R2. I also found that

.NET framework is included in  Enterprise Console 5.1 upgrade. What about Console 4.5.1.0

database in SQL Server. I need to back it up?

Thanks once more.

Thank you!

If the link in NAC is not available when you press on it in Enterprise Console

than it means it is not installed although it is shown in Menu on left side of Console?

I thought to start upgrade end see what are system requirements as you write,

but Console is installed on domain controler therefore i want to avoid as much

problems as it possible. http://www.sophos.com/en-us/products/endpoint/endpoint-protection/components/management-console/system-requirements.aspx  I ask you about NAC because of 2 GB*

written for * Additional memory and disk capacity required for installation of NAC Manager

Server where Console is installed is Windows Server 2003 and R2. I also found that

.NET framework is included in  Enterprise Console 5.1 upgrade. What about Console 4.5.1.0

database in SQL Server. I need to back it up?

Thanks once more.