Please follow the steps below.
1. Navigate to the location C:\Program Files (x86)\Adobe\Adobe Creative Cloud\ACC
2. Right click on Creative Cloud.exe>>Properties>>Compatibility>>Select Windows 7 under "Run this Program in compatibility mode for"
3. Click on OK and close properties window.
Have you verified if your system matches the system requirements for Lightroom 6
* 64-bit support
Why don't I see Lightroom in the Creative Cloud desktop app?
If you're a paying Creative Cloud member, you may not see Lightroom in Creative Cloud if your computer doesn't meet the minimum system requirements. Check to make sure that your system meets the minimum requirements for the latest release of Lightroom.
If you're using a trial version of Creative Cloud, the Lightroom trial is not available through Creative Cloud. It is, however, available as a stand-alone trial. See Lightroom trial download not listed | Creative Cloud desktop app.
Note: Lightroom requires a 64-bit-compatible operating system.
Hope this helps,
Where you able to Get Lightroom installed, or at least find the reason why you couldn't get it installed?