I ran the CCleaner tool to search for out of date drivers. One suggestion was to update the Realtek High Definition Audio driver from version 6.0.1.7404 to version 6.0.9205.1. I was a bit skeptical so I did an online search for the recommended update version which pointed me to 4 pages of search results in the Microsoft Update Catalog. There are 80 entries for version 6.0.9205.1 but each one has a product entry for Windows 10. I am reluctant, indeed afraid, to install it on my Windows 7 PC without explicit confirmation that it is meant for Windows 7 as well as Windows 10.
Surely CCleaner knows my Windows version, but is it used when it searches for driver updates?