Webwire: Yahoo appoints new chief; TalkTalk rapped for security claims

Yahoo is now under the leadership of Scott Thompson, the former president of PayPal. Thompson replaces Carol Bartz, who was sacked as chief executive in September.
UK internet service provider TalkTalk must drop claims its in-built security makes its service the safest in the country, after advertising authorities deemed the claim was misleading.
US software giant Microsoft is suing a UK electrical retailer for creating nearly 100,000 counterfeit recovery CDs for its Windows Vista and XP operating systems.
IBM’s new chief Virginia Rometty is wasting no time in shaping her new executive team, appointing new sales and consultancy chiefs within the first four days at the helm.
Google is strengthening its defenses against smartphone patent lawsuits, buying an additional 187 patents and 36 patent applications from IBM. Google bought 1,000 similar patents from IBM last year.