I am Administering a Customer, who i have had the Job to Install Exchange Server. Which all worked. I took over late Last Year. but found a ESU 2008 R2 Instance on an Old HP Computer which was a Backup Server. Now it failed. It has a Pentium 4, which was okay for the Task, and it had 6GB of RAM where 3 were usable. The Problem: I commisioned it to be a Backup DC. Where i have 2 DCs in Hyper-V on the Other Physical Server, and this Server, so the Backup, is failing somewhat. I got it a SSD and did that in January, and for months it was without issue. Now, i have multiple Domains and Trusts with multiple Domains, so i can sit at home, and use my Domain Account on theirs. Remote Desktop i still do with the Domain Administrator in which the Server is in. I also activated Network Discovery. so this morning i noticed, that from my 20 Servers and 50 Clients, there was something Missing. The 3rd Domain Controller from the Said Domain... I logged on, and saw it showed no Internet Connection. It turns out that the Workstation Client Service failed, which caused NLA to also fail... Now i am unable to Start NLA or any other Service of such... HELP!