Hi, I recently installed 2003 server standard edition in 2 different locations with different hardware setups. But they both have the same problem. On these networks the sever was a completely new install. The clients were 2000 but some of the newer computers had a fresh winxp install. The computers with 2000 work fine, the computers with winxp lose access to mapped drives and resources from the server. They need to login every 4-5 hours. I am sure it is the same problem on both networks. All updates for both the server and winxp have been done. Any suggestions.