Hacker attack and lost

Giuseppe,
We feel sorry to know  this. Please note that these kind of tool bars and search engines get into the computer along with some other software or if we visit any untrustworthy websites accidentally. I would request you to uninstall unknown add ons from your web browsers. Please right click on the desktop shortcuts of your web browsers, click on Properties, check the Target field. It should be “C:Program FilesInternet Exploreriexplore.exe” for IE and “C:Program Files (x86)GoogleChromeApplicationchrome.exe” for Chrome. Please check and remove if any other text is added to this path. Thank you.

Dear all, 
I have bought the license for AVG Ultimate. I have installed it on 2 desktops and 2 laptops as well as phone and tablet. On one of the desktops I have visibility on hackerattacks add-on and I have seen questions on the item when the device is lost. Now I can't find it anymore. But I also don't see those add-ons in the installations I have added. Have I done something wrong. I have now re-installed on one of the laptops.

Giuseppe,
We feel sorry to know  this. Please note that these kind of tool bars and search engines get into the computer along with some other software or if we visit any untrustworthy websites accidentally. I would request you to uninstall unknown add ons from your web browsers. Please right click on the desktop shortcuts of your web browsers, click on Properties, check the Target field. It should be “C:Program FilesInternet Exploreriexplore.exe” for IE and “C:Program Files (x86)GoogleChromeApplicationchrome.exe” for Chrome. Please check and remove if any other text is added to this path. Thank you.