Hi Jonathan,The following is the installation log.I have IIS 8.0 Express installed in my laptop.
=== Logging started: 2016/02/10 10:37:47 ===
Executable: C:\Users\sulav\Desktop\NAV.8.0.41779.W1.DVD\setup.exe v8.0.41779.0
Computer : NAVDEVELOPER
--- logging level: standard ---
RegistrySearch: Checking registry key existence. Id = 'SqlServerInstalled'
RegistrySearch: Checking registry key existence. Id = 'SqlNCLIInstalled'
RegistrySearch: Searching for registry key value. Id = 'DotNetFx45Release'
RegistrySearch: Searching for registry key value. Id = 'VstoInstalled'
RegistrySearch: Searching for registry key value. Id = 'PowerShell30Installed'
RegistrySearch: Checking registry key existence. Id = 'WindowsSearchInstalled'
RegistrySearch: Searching for registry key value. Id = 'Excel14Installedx86'
Registry key not found. Key = 'SOFTWARE\Microsoft\Office\14.0\Excel\InstallRoot'
RegistrySearch: Searching for registry key value. Id = 'Excel14Installedx64'
Registry key not found. Key = 'SOFTWARE\Microsoft\Office\14.0\Excel\InstallRoot'
RegistrySearch: Checking registry key existence. Id = 'Outlook'
RegistrySearch: Checking registry key existence. Id = 'Outlook15'
RegistrySearch: Searching for registry key value. Id = 'VCPPSpLevel'
RegistrySearch: Checking registry key existence. Id = 'VCPPInstalled'
RegistrySearch: Checking registry key existence. Id = 'VCPP64Installed'
RegistrySearch: Checking registry key existence. Id = 'IISInstalled'
RegistrySearch: Searching for registry key value. Id = 'IISWinAuthInstalled'
RegistrySearch: Searching for registry key value. Id = 'IISASPNETInstalled'
Registry value not found. Key = 'SOFTWARE\Microsoft\InetStp\Components', Value = 'ASPNET'
RegistrySearch: Searching for registry key value. Id = 'IISASPNET45Installed'
RegistrySearch: Searching for registry key value. Id = 'IISNETFXInstalled'
Registry value not found. Key = 'SOFTWARE\Microsoft\InetStp\Components', Value = 'NetFxExtensibility'
RegistrySearch: Searching for registry key value. Id = 'IISNETFX45Installed'
RegistrySearch: Searching for registry key value. Id = 'IISISAPEXInstalled'
RegistrySearch: Checking registry key existence. Id = 'HttpActivationInstalled'
RegistrySearch: Searching for registry key value. Id = 'IISISAPIFIInstalled'
RegistrySearch: Searching for registry key value. Id = 'IISREQSTFIInstalled'
RegistrySearch: Searching for registry key value. Id = 'IISSTATICInstalled'
RegistrySearch: Searching for registry key value. Id = 'WebComponentsPrerequisitesInstalled'
Configuring package. Id = 'ARP'
MSI log file set to: C:\Users\sulav\AppData\Local\Temp\setup.wix.msi.22.log
Done configuring package. Id = 'ARP' ReturnCode = 0
Configuring package. Id = 'SQLSysClrTypes'
MSI log file set to: C:\Users\sulav\AppData\Local\Temp\setup.wix.msi.23.log
Done configuring package. Id = 'SQLSysClrTypes' ReturnCode = 0
Configuring package. Id = 'SQLSysClrTypes64'
MSI log file set to: C:\Users\sulav\AppData\Local\Temp\setup.wix.msi.24.log
Done configuring package. Id = 'SQLSysClrTypes64' ReturnCode = 0
Configuring package. Id = 'ReportViewer'
MSI log file set to: C:\Users\sulav\AppData\Local\Temp\setup.wix.msi.25.log
Done configuring package. Id = 'ReportViewer' ReturnCode = 0
Configuring package. Id = 'IISURLRewite'
MSI log file set to: C:\Users\sulav\AppData\Local\Temp\setup.wix.msi.26.log
Windows Installer: Error: A newer version of IIS URL Rewrite Module 2 was found on this machine.
Done configuring package. Id = 'IISURLRewite' ReturnCode = 1603
Rolling back MSI package. Id = 'ARP'
MSI log file set to: C:\Users\sulav\AppData\Local\Temp\setup.wix.msi.27.log
Done rolling back MSI package. ReturnCode = 0
SUCCESS: Package Microsoft System CLR Types for SQL Server 2012 executed sucessfully.
SUCCESS: Package Microsoft System CLR Types for SQL Server 2012 executed sucessfully.
SUCCESS: Package Microsoft Report Viewer Redistributable 2014 executed sucessfully.
ERROR: Package Microsoft IIS URL Rewrite Module (64-bit) failed with error. See detailed message above.
=== Logging stopped: 2016/02/10 10:39:12 ===
