The 888-972-9165 phone number is associated with a browser hijacker that may show disturbing security alerts on infected computers. Also, the 888-972-9165 phone number may be related to several financial hoaxes and threats from fake agents of the IRS (Internal Revenue Service). The browser hijacker mentioned before, may appear as a search optimizer in the Extensions Manager of browsers it is attached to. Most browser hijackers are deployed with free software installers because most users tend to install freeware with the 'Express' or 'Typical' option and do not bother to 'look into the box. ' Computer users that installed the browser hijacker at hand might experience pop-up windows that resemble the official page of the Microsoft Support team that is found at Support.Microsoft.com. Web pages that look like Support.Microsoft.com and may direct users to call 888-972-9165 are a hoax.