I'm sorry about the issue. Can you please click on the gear / wheel icon at the upper right corner, then click on Internet Options, then set your home page centurylink.com there , then apply/ok.
Note: If you use the Microsoft Edge program, then in it, then try:
Select 3-dot icon on the address bar on the top right corner, then Settings.
Under Open with, select A specific page or pages.
Select Custom to enter the website centurylink.com
To save, select the plus button.
Please reply at the box below to continue troubleshooting. Thank you.