I am using a regular system, nothing virtual, my C drive is not mapped which I see in some forums. Environment path not set?

I started a tutorial to learn Powershell, and the first thing I tried to execute was very simple: 

```

PS C:\Users\user> get-help get

```

Error I receive:

```

get-help : Cannot find drive. A drive with the name '.C' does not exist.
At line:1 char:1
+ get-help get
+ ~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (.C:String) [Get-Help], DriveNotFoundException
    + FullyQualifiedErrorId : DriveNotFound,Microsoft.PowerShell.Commands.GetHelpCommand

```

Image:
[![enter image description here](https://i.stack.imgur.com/FJsc4.png)](https://i.stack.imgur.com/FJsc4.png)

System:

Windows7, Powershell 4.0, .NET 4.5