Microsoft Core XML Services (MSXML) 6.0 not found. Please install MSXML 6.0 to run ProjectWise Explorer V8i(SELECTseries 4)
This can happen when running the MSI directly on a Windows 7 machine with UAC enabled, if the Windows user does not have full elevated permissions.
Click start and type CMD in the search field
Right click on cmd.exe and select "Run as Administrator"
cd c:\bentleydownloads\pwclt081111559en\explorer (cd and then the path to the MSI file)
4. Start typing the name of the file and hit the tab key (be sure to select the correct one depending on the OS, 32 or 64 bit)
5. Complete the installation wizard as normal