error code C190 unable to install. what happens to 7 days trial?

Adobe offers the current and ONE older version... and they will not work with Win8

https://helpx.adobe.com/creative-cloud/system-requirements.html
-Win7 is dead https://www.microsoft.com/en-us/windows/windows-7-end-of-life-support-information
-Win8 is also no longer supported https://support.microsoft.com/en-us/help/4580358/windows-8-1-update

You have 2 choices

1 - upgrade to Win10

2 - cancel your subscription before you are locked into a one year payment

To Cancel https://helpx.adobe.com/manage-account/using/cancel-creative-cloud-subscription.html
-FAQ https://community.adobe.com/t5/account-payment-plan/cancel-subscription-faq-s/td-p/11843852

or

Be sure to remain signed in with your Adobe ID before accessing the link below
Do be aware that Adobe's staffing is impacted by the virus, so wait times are long
-make sure that your browser does NOT block ads, scripts, or pop-ups
-you must also allow 'cookies' in your web browser for this to work
https://helpx.adobe.com/contact.html?rghtup=autoOpen
.
Also: beware of answering anyone who sends you a private message
-click for more information about scammers https://tinyurl.com/10791730