The K1000 Agent (and quite a few other software packages for enterprise networks) requires Windows Simple File Sharing to be turned off. You can turn it off in one of two ways:
1. From Windows Explorer, go to Tools > Folder Options > View > Advanced Settings > Use Simple File Sharing (off)
2. Via group policy:
Computer Configuration > Windows Settings > Security Settings > Local Policies > Security options > Network access: Sharing and security model for local accounts
Guest Only – Local users authenticate as guest - simple file sharing is enabled
Classic - Local users authenticate as themselves - simple file sharing is disabled