Update Notification of New release

Hi Anonymous ,

Sorry for our delay in response, If you are still occurred this issue after install the February version of Power BI Desktop, Could you please check the following things?

1- Is it only one machine that has this issue or multiple ones?

2- For the machine that is not working, when did it stop, with which release?

3- I am also suspecting that might be network security blocking the notification request for some reason.

Would they please try this link in the browser https://go.microsoft.com/fwlink/?LinkID=524399, this is the actual request sent from the Application to check for a newer version. If this request is successful it should retturna .json file looking like the following. If, they couldn't get successful response, then that should be the issue.
{

    "release":
    {
        "x86":[{"key":"ClientExpiryDateTime","value":"2015\/01\/01"},{"key":"ClientExpiryVersion","value":"0.0.0.0"},{"key":"ClientUpdateLocation","value":"https:\/\/go.microsoft.com\/fwlink\/?LinkID=524794"},{"key":"ClientUpdateVersion","value":"2.76.5678.781"},{"key":"PublishFileSizeLimitInMB","value":"1024"},{"key":"ShowLeadGenDialog","value":"1"},{"key":"ImportV2MinFileSizeLimitInMB","value":"1024"},{"key":"PremiumWorkspacePublishFileSizeLimitInMB","value":"10240"}],
        "x64":[{"key":"ClientExpiryDateTime","value":"2015\/01\/01"},{"key":"ClientExpiryVersion","value":"0.0.0.0"},{"key":"ClientUpdateLocation","value":"https:\/\/go.microsoft.com\/fwlink\/?LinkID=524795"},{"key":"ClientUpdateVersion","value":"2.76.5678.781"},{"key":"PublishFileSizeLimitInMB","value":"1024"},{"key":"ShowLeadGenDialog","value":"1"},{"key":"ImportV2MinFileSizeLimitInMB","value":"1024"},{"key":"PremiumWorkspacePublishFileSizeLimitInMB","value":"10240"}]
    },
    "preview":
    {
        "x86":[{"key":"ClientExpiryDateTime","value":"2015\/01\/01"},{"key":"ClientExpiryVersion","value":"0.0.0.0"},{"key":"ClientUpdateLocation","value":"https:\/\/go.microsoft.com\/fwlink\/?LinkID=524794"},{"key":"ClientUpdateVersion","value":"2.76.5678.781"},{"key":"PublishFileSizeLimitInMB","value":"1024"},{"key":"ShowLeadGenDialog","value":"1"},{"key":"ImportV2MinFileSizeLimitInMB","value":"1024"},{"key":"PremiumWorkspacePublishFileSizeLimitInMB","value":"10240"}],
        "x64":[{"key":"ClientExpiryDateTime","value":"2015\/01\/01"},{"key":"ClientExpiryVersion","value":"0.0.0.0"},{"key":"ClientUpdateLocation","value":"https:\/\/go.microsoft.com\/fwlink\/?LinkID=524795"},{"key":"ClientUpdateVersion","value":"2.76.5678.781"},{"key":"PublishFileSizeLimitInMB","value":"1024"},{"key":"ShowLeadGenDialog","value":"1"},{"key":"ImportV2MinFileSizeLimitInMB","value":"1024"},{"key":"PremiumWorkspacePublishFileSizeLimitInMB","value":"10240"}]
    }
}

4- Using fiddler, (but you need to enable https request first), after get Fiddler ready, run Power  BI Desktop and check in Fiddler if the request I mentioned above in #3 is actually issued from the application or not

Best regards,