Can't install on Windows 7

Hello

I am trying to install Sketchup 2015 Make on Win7 (64-bit) Enterprise (still for personal use though). I am logging in as an administrator, and running “as administrator”.

I get the error;
Prerequisite check for system component Microsoft Windows failed with the following error message:
“Installation of SketchUp requires Windows 7 or later.”

I check the log file and it contains the following;
The following properties have been set:
Property: [AdminUser] = true {boolean}
Property: [InstallMode] = HomeSite {string}
Property: [ProcessorArchitecture] = AMD64 {string}
Property: [VersionNT] = 5.1.2 {version}
Running checks for package ‘Microsoft Windows’, phase BuildList
The following properties have been set for package ‘Microsoft Windows’:
Running checks for command ‘SketchUpPrerequisites\32-bit’
Result of running operator ‘ValueNotEqualTo’ on property ‘ProcessorArchitecture’ and value ‘Intel’: true
Result of checks for command ‘SketchUpPrerequisites\32-bit’ is ‘Bypass’
Running checks for command ‘SketchUpPrerequisites\64-bit’
Result of running operator ‘ValueNotEqualTo’ on property ‘ProcessorArchitecture’ and value ‘AMD64’: false
Result of running operator ‘VersionGreaterThanOrEqualTo’ on property ‘VersionNT’ and value ‘5.2.2’: false
Result of running operator ‘VersionLessThan’ on property ‘VersionNT’ and value ‘5.2.2’: true
Result of checks for command ‘SketchUpPrerequisites\64-bit’ is ‘Fail’
‘Microsoft Windows’ RunCheck result: Fail
A prerequisite failed for Package “Microsoft Windows”
Package failed with message “Installation of SketchUp requires Windows XP Professional x64 Service Pack 2 or later.”

I ver from command prompt and get ;
Microsoft Windows [Version 6.1.7601]

I tried the same again with 2014 Make and get a similar error (though it references WinXP or later rather than Win7).

Is there a compatability issue with Enterprise version of Windows and Make, or am I doing something else wrong.

Thanks in advance.

Simular problem when installing SU Make on Windows 10 64-bits
Microsoft Windows [Version 10.0.10586]
details of installer:
The following properties have been set:
Property: [AdminUser] = true {boolean}
Property: [InstallMode] = HomeSite {string}
Property: [ProcessorArchitecture] = AMD64 {string}
Property: [VersionNT] = 6.0.0 {version}
Running checks for package ‘Microsoft Windows’, phase BuildList
The following properties have been set for package ‘Microsoft Windows’:
Running checks for command ‘SketchUpPrerequisites64\MinimumWindowsVersion’
Result of running operator ‘VersionGreaterThanOrEqualTo’ on property ‘VersionNT’ and value ‘6.1’: false
Result of running operator ‘VersionLessThan’ on property ‘VersionNT’ and value ‘6.1’: true
Result of checks for command ‘SketchUpPrerequisites64\MinimumWindowsVersion’ is ‘Fail’
‘Microsoft Windows’ RunCheck result: Fail
A prerequisite failed for Package “Microsoft Windows”
Package failed with message “Installation of SketchUp requires Windows 7 or later.”