This solution was posted by Comcast on another string. It worked for me.
Please go through the comprehensive list below and let us know if this resolves your issue.
1. Please make sure you are running the most recent version of flash. To confirm, please go to this page to download the most recent version:
http://get.adobe.com/flashplayer/
2. Navigate your browser to: http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager03.html
3. Make sure "Allow third-party Flash content to store data on your computer" and "Store common Flash components to reduce download times" options are both checked.
4. Move the "Specify the amount of disk space..." slider to 100 KB.
5. Navigate your browser to: http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html
6. Clear the Flash Player Cache by pushing the "Delete all sites" button.
7. Make sure your third party cookies are enabled:
MAC USERS:
FIREFOX BROWSER (FOR MAC USERS)
Click on “FIREFOX” (at the top left of screen)
--> Preferences
--> Privacy tab
--> Open drop down next to "Firefox will:" and set it to "Use custom settings for history"
--> Make sure "accept cookies from sites" is checked
--> Make sure "Accept third-party cookies" is checked
--> Keep until: "they expire" (in drop down)
SAFARI BROWSER (FOR MAC USERS)
Click on “SAFARI” (at the top left of screen)
--> Preferences
--> Security Tab
--> Accept Cookies (check “Always”)
CHROME BROWSER (FOR MAC USERS)
Click on “CHROME” (at the top left of screen)
--> Preferences
--> Scroll to bottom of page and click on “Show Advanced Settings”
--> Privacy –> Click on “Content Settings”
--> Cookies – >Check “Allow local data to be set” also make sure “Block third-party cookies and site data” IS NOT CHECKED.
--> Click “ok” at bottom of page.
PC USERS:
INTERNET EXPLORER (FOR PC USERS)
-->Click on Tools
--> Internet Options
--> Privacy Tab
--> Click the Advanced button in center of page
--> Make sure the radio button next to Accept is checked below “First-party Cookies” and “Third-party Cookies”
--> Click “OK”
FIREFOX BROWSER (FOR PC USERS)
--> Click on FIREFOX (top left of screen)
--> Click on Options
--> Click Privacy Tab
--> Open drop down next to "Firefox will:" and set it to "Use custom settings for history"
-->Make sure "accept cookies from sites" is checked
--> Make sure "Accept third-party cookies" is checked
--> Keep until: "they expire" (in drop down)
--> Click “Ok” at bottom
SAFARI BROWSER (FOR PC USERS)
--> Click on the wheel on the top right, below the X in the red box
--> Click Preferences
--> Click the Privacy Tab
--> Block Cookies: click “Never”
--> X out of pop up
CHROME BROWSER (FOR PC USERS)
Click on the wrench at the top right of the screen
--> Settings
--> Scroll to bottom of page and click on “Show Advanced Settings”
--> Privacy – Click on “Content Settings”
--> Cookies – Check “Allow local data to be set” also make sure “Block third-party cookies and site data” IS NOT CHECKED.
--> Click “ok” at bottom of page.
8. Close your browser and then reopen your browser.
9. Start the verification process here: http://www.nbcolympics.com/liveextra/help/index.html
