What is Comcast Toolbar?
By Comcast Cable Communications
What is it?
XFINITY/Comcast Toolbar is a Visicom Media platform toolbar and browser helper object (BHO) for Internet Explorer and distributed through Comcast. The XFINITY Toolbar includes a search bar which provides modified search redirection results and a search provider. This toolbar is simply a rebrand of the Visicom MyStart Toolbar.
Why should I uninstall Comcast Toolbar?
Removing unwanted toolbars is usually a good idea. This VMN XFINITY/Comcast Toolbar, like other web browser extensions, can potentially have adverse effect on your web browser's and overall PC's performance and stability. This toolbar is known to monitor your search queries and browsing habits in order to send you targeted ads and modify your search settings and results
Typical installation path: C:\Program Files\comcasttb\
Description from Comcast Cable Communications“Download the Comcast Toolbar and instantly get to the tools and services you use every day. Quickly see if you're signed in (Click the logo and go directly to your Comcast homepage.) With direct access to the Constant Guard™ Protection Suite right from your Comcast Toolbar, you can get to your online security dashboard quickly and easily. Whether you encounter a fraudulent web site, need a password or just want to backup a file, you can do it all instantly. Once the installation has been successfully completed, your browser will open and take you directly to the Comcast Toolbar introduction page. From there, learn about all the toolbar features and begin customizing your toolbar!”
Publisher about URL: http://xfinity.comcast.net/toolbar3/
Comcast Toolbar technical details
Name: XFINITY Toolbar
Publisher: Visicom Media Inc.
Type: Toolbar
Class ID: {4B9BCCE8-A70B-402A-A7E1-DB96831EE26F}
File: comcastdx.dll
Folder: C:\Program Files\xfin_portal
Name: XFINITY Toolbar
Publisher: Visicom Media Inc.
Type: Browser Helper Object
Class ID: {4B9BCCE8-A70B-402A-A7E1-DB96831EE26F}
File: comcastdx.dll
Folder: C:\Program Files\xfin_portal
Comcast Cable Communications policies
The following can be found in Comcast Cable Communications's privacy policies and terms of service:
“VMN.net collects personal information on certain areas of the Site when users register, sign up for newsletters, participate in surveys and download a”
How to Automatically Uninstall Comcast Toolbar (with Boost)
If you you do not have Boost installed yet, download Boost and enjoy your PC.
Open Boost by either double-clicking the Boost icon 
in your notification area next to your PC's clock, or single-clicking the Boost icon and clicking the Open Boost button on the top left of the Boost notification window.
If you are not currently on the My PC screen of the main Boost window, click the My PC tab.
Click the Optimize programs button 
, this will launch the Program Optimization screen.
Locate the program in the list called Comcast Toolbar by Comcast Cable Communications. (The program could be listed under any of the section such as Uninstall Recommended, Possible Uninstall, etc. based on how well Comcast Toolbar performs on your PC.)
Comcast Toolbar by Comcast Cable Communications
To the right of the list item, click the Uninstall 
button and Boost will completely remove Comcast Toolbar from your PC.
How to Manually Uninstall Comcast Toolbar (with Windows)
Use Add/Remove Programs control panel in Windows makes to uninstall Comcast Toolbar. Follow the appropriate instructions below to use this control panel.
Windows 7
From the Start menu, select Control Panel.
In Large or Small icon view, click Programs and Features. If you're using Category view, under "Programs", click Uninstall a program.
Select Comcast Toolbar from the list of programs, and click Uninstall. Alternatively, right-click the program and select Uninstall.
Windows Vista
From the Start menu, select Control Panel.
In Classic View, double-click Programs and Features. In Control Panel Home view, under "Programs", click Uninstall a program.
Select Comcast Toolbar from the program list, and click Uninstall. Alternatively, right-click the program and select Uninstall.
Windows XP
From the Start menu, select Control Panel.
Click the Add or Remove Programs icon.
Select Comcast Toolbar from the list of programs and click Remove.