Love tail command on Linux? Try Get-Content with Powershell 3.0+.
Powershell Get-Content
Example: Keep reading the last 20 lines from C:\Windows\WindowsUpdate.log file
PS C:\> Get-Content C:\Windows\WindowsUpdate.log -Tail 20 -Wait
 |
| Read 20 last line from C:\Windows\WindowsUpdate.log file |
Count how many lines in a text file
PS C:\> (Get-Content C:\Windows\WindowsUpdate.log).Count