What is BrowserCompanion?
What is it?
The Browser Companion toolbar and web browser plugin will redirect legitimate search queries to an affiliate search results page.
Why should I uninstall BrowserCompanion?
The BrowserCompanion web browser plug-in, like other web browser extensions, can potentially have have adverse effect on your web browser's and overall PC's performance and stability. The BrowserCompanion 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\BrowserCompanion\
How to Automatically Uninstall BrowserCompanion (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 BrowserCompanion . (The program could be listed under any of the section such as Uninstall Recommended, Possible Uninstall, etc. based on how well BrowserCompanion performs on your PC.)
BrowserCompanion
To the right of the list item, click the Uninstall 
button and Boost will completely remove BrowserCompanion from your PC.
How to Manually Uninstall BrowserCompanion (with Windows)
Use Add/Remove Programs control panel in Windows makes to uninstall BrowserCompanion. 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 BrowserCompanion 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 BrowserCompanion 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 BrowserCompanion from the list of programs and click Remove.