Lightroom 6.9 disc won't install on Windows 10

I would hope, for you, that it is a legitimate copy, but-

From your photo of the disk I strongly have my doubts, sorry!

My opinions-

1) It has always been very easy to print to CD/DVD disks with home inkjet printers and copied images (fakes easy to print).

2) Odd that the disk does not have both Windows and Mac versions of the install.

3) Several bits of information usually showing on Adobe genuine DVDs are missing.

4) The disk sleeve has a simple sticker- anyone could print, and you do not have a Serial Number.

5) With Version 6 most purchases were by a digital download, and v6.9 'update' would have been a digital download- not sold on disk?

6) From Version 6, Lightroom had to be Activated by internet connection to an Adobe account. "Keyless activation" not possible.

I suspect your disk is an "ISO Disk Image" that would be specific to your original computer system, and not possible to do a fresh install on a new system.

I attach some screen-clips of interest only- I still have Lr-3 & 4 on DVD- Both with Serial Number Stickers on box or case.

And LOL- I found my Invoice for a Lightroom-3 purchase-  AU$429  - What a bargain we get now with the Photography plan!!

I have never heard of Lightroom supplied as "Bundled" software- "keyless activation".

(Could be a non-genuine copied version? can we see a scan/photo of the pack?)

TBMK- Every Lightroom Install since Version-1 requires a Serial Number Key (except Subscription versions). Either printed on CD box/sleeve or supplied by Adobe in response to a 'Redemption Code' or a purchase.

Redemption codes can only be used once to obtain a Serial Number, but if supplied by Adobe this would be recorded in your Adobe Account. https://account.adobe.com/

Lightroom v6 installs fine on a Windows-10 (or Windows-7 SP1) system. v6 requires a 64-bit system! 32bit installers will work (different to Mac Catalina!)

https://helpx.adobe.com/lightroom-classic/system-requirements/earlier-versions.html

So- Why it will not install is a mystery- needs more investigation.

Moving to correct community

Been following this issue with other users. Apparently the installer for Lightroom 6 is a 32-bit application, and Windows 10 is 64-bit only and won't run the installer for Lightroom 6. Lightroom 6 is not in production anymore, not being updated nor supported by Adobe anymore. From the reading I have done, I don't know that there is a solution to your problem. If there is, I hope someone else knows what it is.