This looks like an AD error. Please contact your system administrator and provide the error info and they should be able to rectify the issue....

Dropping the login and re-creating it would do it in some scenarios... or running the SSMS as an Admin will do the job...

Also, please take a look into the below articles....

http://www.sqlservercentral.com/Forums/Topic644009-6-1.aspx

http://blogs.msdn.com/b/sqlserverfaq/archive/2010/10/27/troubleshooting-specific-login-failed-error-messages.aspx

Hope this helps!