Networking:

Restrict Anonymous User Access
Anonymous users can list domain user names and enumerate share names by default. Lets stop this from happening!

MS Docs:
246261
296405
163846

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\LSA]
"RestrictAnonymous"="1"

2 can only be used in "pure" environments. You'd better read those MS docs if you need more information about that setting cause I don't want to explain it here ;)

Automatic Hidden Shares:
You'll find all these mysterious shares that look something like C$ which you can't simply delete. These are called administrative shares which the only way that I've found to remove these is through the registry.

They are created automatically on local disk drives in 2k and XP both.

MS Docs:
245117
288164

Lets disable this. 0 means disabled, 1 means enabled

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters]
"AutoShareServer"="0"
"AutoShareWks"="0"

Hide Share Passwords with Asterisks
When you're accessing a password protected share, Windows shows the password in clear text when you're entering it. Lets replace this with asterisks.

[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Network]
"HideSharePwds"="1"