I don't know which link you've used, you installed a subscription based version, as @Rob_Cullen wrote.
By @AxelMatt
If the installer detects a Creative Cloud subscription, it will install as version 2015.14.
This is the same version as 6.14, but has a few more features, like Clarity.
Lr 6 was released at the same time as Creative Cloud was introduced.
You could buy it as a standalone (perpetual) version, or get it as part of the subscription based Photography plan, in which case it installed as Lightroom CC 2015.
@sigo
As mentioned by @Rob_Cullen you either have a Creative Cloud subscription or a 7 day trial.
The first system info you posted reports that you are running Windows 8, the second reports Windows 10.
Are both these system infos from the same computer? Lightroom is known to sometimes report the wrong Windows version.
If you have Windows 8 and a Creative Cloud subscription (not sure if that's possible), you will not be able to install the current version of LrC (14.4), which requires Windows 10 or later.
If you have Windows 10, the current version of LrC might install and run, but it will be very slow because of your very old GPU. The Nvidia Quadro K3000M was released in 2012, so it's 13 years old.
You also have only 8 GB RAM, which is listed as minimum by Adobe, but you really need 16 GB or more.
But if Lr 6 works OK, you can of course continue to use that.
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