2 days ago I updated to 4.2.58 and all hell broke loose. File server became completely useless, I get all the symptoms described in this Microsoft article http://support.microsoft.com/kb/822219 Client computers are fine, but any time there is an operation on remote files, network lag is worse than on 56k modem. Our ERP software is running of the file share, also all user settings, documents and applications settings are redirected to file server. So this behavior renders our network useless. Everything worked fine on 4.2.40. After removing nod32 from file server everything is back to normal. Anyone else experienced similar issues?