1 Answer

You first have to remove INBOX from your computer as it is a form of maleware. 

1. Click the "inbox" button on the "Inbox.com" toolbar.

2. Click "Help" and select "Uninstall." A window labeled, "Crawler Toolbar Uninstallation" (the brand behind the "Inbox.com" toolbar) will appear.

3. Click every item in the list under the "Important:" heading. Once every item has been selected, click the "Uninstall" button at the bottom of the window. When prompted, select "Yes" to begin the uninstallation process. You will then be prompted to select "Yes" again to reboot your computer and complete the uninstallation process. Click "Yes" to reboot your computer and successfully uninstall the "Inbox.com" toolbar. Souce: http://www.ehow.com/how_8313224_officially-remove-inboxcom-computer.html#ixzz2xIdXE8Di

Once INBOX is removed from your computer, you can go ahead and install the Google browser/toolbar.