Add a trusted location in Windows

Because you usually want to leave UAC on in Windows, it's sometimes useful to add a trusted location:

1. Control Panel → Network and Intranet → Network and Sharing Center
2. Bottom left there is a 'See Also' section, click on 'Internet Options'.
3. Select Local intranet zone on the Security tab then click the Sites button
4. Click Advanced button
5. Enter file://[computer name]
6. Make sure 'Require server verification...' is unticked

Trust relationship between machine and AD failed

I've run into this problem only a couple of times and Technet has quite a few possible solutions - the one that worked for me was using Netdom.

Using NSlookup.exe

Useful for checking DNS settings, the most basic command is:

nslookup [hostname] [server]

More at Microsoft's support page. Linux uses host with more advanced alternatives being dig or drill.

Check open files and folders on a Windows server

I have a couple of networked apps where it can be useful to check which user has a certain file open (often because the app didn't close cleanly) on a given server. This is found in the Computer Managment console under System Tools -> Shared Folders -> Open Files.

Slow network share browsing

I recently had a couple of new computers with Windows 7 (64 bit Professional) in an AD environment experience seriously slow browsing of network folders with JPEG files. Windows Explorer would slow to a crawl, often crashing outright. Googling the problem provides many, many supposed solutions, mostly centering around the network adapter properties (disabling remote Differential Compression, disabling Autotuning, disabling Flow Control, etc), none of which worked.

As of this writing, disabling SMB2 (and SMB3) on the client side seems to have worked (speaking to the former admin this was already disabled on the Win2K8 server).