remove ask a homepage

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- Click the "Start" button and select "Control Panel"
- Click "Uninstall a Program" option found under the "Programs" category
- Select the program with the Ask logo and the text "Ask Toolbar"
- Click "Remove"
 
 
Internet Explorer
Launch Internet Explorer browser and click the option 
Choose the option Manage Add-ons from the sub menu that opens.
From the Manage Add-ons window, locate Ask toolbar and remove the check mark in the box for Enabled.
Select Search Providers. First of all, choose another search engine (Google, yahoo, Bing) and make it your default search provider (set as default).
Then select Ask Search and click Remove button to uninstall it (lower right corner of the window).
Restart Internet Explorer.
 
 
Mozilla Firefox
Open Mozilla Firefox and go to Extensions.
Locate Ask Toolbar from the list of add-ons. Mozilla provides you with two options. You can either Remove the toolbar or Disable it temporarily. Click any of the options.
After that, go to Firefox, and then choose Help, and then Troubleshootinginformation and then Reset Firefox.
 
Google Chrome
Launch Google Chrome and click the icon located on the right top corner.
Select the option Settings from the sub menu.
Click on Extensions from the left pane of the Windows, which is located just above the option Settings.
You may Disable the toolbar by removing the check mark from the optionEnabled. If you wish to remove the toolbar, click the recycle bin icon found next to the Enabled option.
Click on Chrome menu button once again. Select Settings.
Click Manager Search engines button under Search.
Select Google or any other search engine you like from the list and make it your default search engine provider.
Select Ask Search from the list and remove it by clicking the "X" mark as shown in the image below.
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Please read:
How to Remove Potentially Unwanted Applications
https://community.webroot.com/t5/Techie-KB/How-to-Remove-Potentially-Unwanted-Applications/ta-p/40744