Thanks for this. They are both running Windows 8.1 and should be sufficient spec. On one of them i don't see that log. However, on the other, i see this -
[4/1/2016, 17:4:36] === Logging started: 2016/04/01 17:04:36 ===
[4/1/2016, 17:4:36] Executable: C:\Windows\ccmsetup\NDP452-KB2901907-x86-x64-AllOS-ENU.exe v4.5.51209.34209
[4/1/2016, 17:4:36] --- logging level: standard ---
[4/1/2016, 17:4:36] Successfully bound to the ClusApi.dll
[4/1/2016, 17:4:36] Error 0x80070424: Failed to open the current cluster
[4/1/2016, 17:4:36] Cluster drive map: ''
[4/1/2016, 17:4:36] Considering drive: 'C:\'...
[4/1/2016, 17:4:36] Considering drive: 'D:\'...
[4/1/2016, 17:4:36] Drive 'D:\' is rejected because of the unknown or unsuitable drive type
[4/1/2016, 17:4:36] Drive 'C:\' has been selected as the largest fixed drive
[4/1/2016, 17:4:36] Directory 'C:\3cb7b0a25e06b4f5a2432bb857\' has been selected for file extraction
[4/1/2016, 17:4:36] Extracting files to: C:\3cb7b0a25e06b4f5a2432bb857\
[4/1/2016, 17:5:8] Extraction took 32.74 seconds
[4/1/2016, 17:5:8] Executing command line: 'C:\3cb7b0a25e06b4f5a2432bb857\\Setup.exe /q /norestart /log C:\Windows\ccmsetup\logs\dotNetFx452_Setup.log /x86 /x64 /redist'
[4/1/2016, 17:5:24] Exiting with result code: 0x0
[4/1/2016, 17:5:24] === Logging stopped: 2016/04/01 17:05:24 ===