How  to us nslookup: :\> nslookup Default Server: pdc.corp.example.com Address: 192.168.6.13 > server 10.255.255.255 Default Server: dns1.example.com Address: 10.255.255.255 > set q=mx > contoso.com. Server: dns1.example.com Address: 192.168.10.10 contoso.com MX preference = 10, mail exchanger = mail1.contoso.com contoso.com MX preference

1. How to show hidden files/folders Open File Explorer and press ALT to show the menu Go to Tools > Folder Optsions 2. Start RDP Client command line: mstsc 3. File System Checking fcs /scannow System File Checker is a