Enter in the Run dialog (Win + R) or in the search box Start (starting with Vista, does not work for everything). For home OS versions, some snap-ins may be missing.
ncpa.cpl - network connections. It was always annoying that in Vista there is no direct access to network connections, and you need to look at the properties and turn on / off network interfaces. For Windows 7, this is less relevant - the network is somehow closer.
compmgmt.msc - computer management. I often go there to see what is shared, how the disks are marked up, to stop or restart any service. There is also a list of devices connected to the computer. ')
secpol.msc - security policies. In WinXP SP2, I remember, only there it was possible to put a flag so that the computer could be listed in any network environment. For Vista, the flag that allows you to remove UAC for admins is more interesting. If you are under the administrator, then you do not need to constantly confirm every action. In Windows 7, the default settings are such that changing system preferences does not lead to the appearance of the UAC window. Which greatly reduces the desire to break it off =)
control userpasswords2 - passwords stored in the system. Here you can reset the memorized password. A more interesting option is the ability to log in to another system under a different account. Otherwise, you’ll go to a shared computer, then you will shake up your security settings - and you’ll knock with the old credentials by default.
msconfig - enumeration of programs started at OS start. IMHO it is better to use Autoruns from SysInternals, but when they are not there, msconfig can also help turn off any nastiness that slows the start of the system.
rundll32.exe sysdm.cpl, EditEnvironmentVariables are environment variables. Yes, it is impossible to remember. But once entered into the dialogue, you can then call from the command history.