I am writing to let you know that we are aware that after installing the February security updates a limited number of users are experiencing issues restarting their computers. Our initial analysis suggests that the issue occurs after installing MS10-015
(KB977165). However, we have not confirmed that the issue is specific to MS10-015 or if it is an interoperability problem with another component or third-party software. Our teams are working to resolve this as quickly as possible. We also stopped offering this update through Windows Update as soon as we discovered the restart issues.
However, those using enterprise deployment systems such as SMS or WSUS will still see and be able to deploy these packages.