so these two below are nothing to worry about?
PUP.Optional.InstallCore, HKU\S-1-5-21-3566801399-2271021477-550365287-1003\SOFTWARE\ICSW1.23
PUP.Optional.InstallCore, HKU\S-1-5-21-3566801399-2271021477-550365287-1003\SOFTWARE\ICSW1.23
one site i looked at said InstallCore, was not good.
I also clicked on your link for ublock to add it.
But googling it first i then found a post on Mawarebytes labs that said beware of fake ublocks.
https://blog.malwarebytes.com/cybercrime/2016/09/imitation-ublock-origin-app-spotted-on-chrome-store/
Now i'm not questioning you in any way so please do not be offended.
The artical links to this one, which is different to the one you linked.
https://chrome.google.com/webstore/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm?hl=en
A quick search on the store and it shows 3 different versions