You may need to uninstall all Windows Live applications, but before we get to that stage, backup your account settings in Windows Live Mail, to do this click Tools > Accounts and highlight each one in turn and click Export (save to a location you will remember, actually a good thing to do as its a great way to beackup your email account settings). Plus use this app and backup your email just incase the accounts are not set to keep a copy on the server.

But try this first, click Start > Run and paste this bold line in and hit enter msiexec /x {A853BEB2-B270-4645-AAAA-9D83C2233BD3} hopefully should uninstall offending search component.

Also to preempt a question I may have and to save time, download and install CCLeaner and run its cleaner and registry components (the cleaner removes old junk temps but does also remove cookies, so if you have any websites set to auto log you in on opening you will have to add the user/pass again or in CCleaners menu Options > Cookies, highlight and send to Cookies to Keep side the ones you wish to keep).