Basic command line and run utilities

cmd utilities :

ipconfig - network configuration details
nslookup - dns details
ping - checks connectivity
wuauclt /detectnow - checks Windows updates from WSUS server
ipconfig /flushdns - flush dns entries
ipconfig /registerdns - register dns entries
gpupdate /force - updates group policies

run utilities :

mstsc - RDP
windowsupdate.log - log file for Windows updates
services.msc - services
gpmc.msc - group policy management
dsa.msc -AD users and computers
inetcpl.cpl - Internet properties
diskmgmt.msc - disk management
compmgmt.msc - computer management
devmgmt.msc - device manager
eventvwr.msc - event viewer
msconfig - system configuration
regedit - registry editor