Check out which companies are making headlines after the bell Monday:

Microsoft - The Dow component announced a $6.2 billion non-cash goodwill impairment charge for the fourth quarter of 2012 related to the 2007 purchase of the online ad business aQuantive. The company said the accounting writedown will not affect its business or ongoing financial performance, but shares still slipped in extended-hours trading.(Click here for extended-hours quote.)