We have NOD32 Business Edition installed on several locations with Microsoft SBS2003 Servers and WinXP as clients. Cients are updated through mirror and everything worked fine until last month when problem occured on two locations. The problem is that update on ALL client stopped working although server has latest update. In fact client NOD32 start downloading updates from mirror but fail when it should install them. To solve the problem I must delete mirror files on server and create/update mirror again but that is only temporarily solution. Problem occurs randomly every couple of days. What is cause of that problem and how could I solve the problem permanently because it's only matter of time when it will occur on all other locations.