If you find that various services are automatically stopping on your server which is causing network shares to disable, then there is a high chance that your network has been affected with the conflicker virus.

Make sure your AntiVirus is up to date. Running an anti virus scan will not help as the virus will reappear.

Microsoft have released a solution for this issue which can be found by accessing the link below:

http://support.microsoft.com/kb/962007

Please note that the fix includes editing the registry. Please be careful when editing the registry. If unsure, please seek help.