How are you accessing email and on what kind of device? If a browser, which one and have you tried different browsers? What if you right-click for options?
How are you opening your email account? Using the MyXfinity.com website or a email app like Outlook? I have an HP desktop as well anduse Outlook and do not have issues. Also going to the MyXfinity site for email https://xfinityconnect.email.comcast.net/, I am able to click on an email which opens fine. I just used a Chrome browser with no issues.