These are the locations of PowerShell profiles:
%windir%\\system32\\WindowsPowerShell\\v1.0\\profile.ps1
%windir%\\system32\\WindowsPowerShell\\v1.0\\Microsoft.PowerShell_profile.ps1
%UserProfile%\\My Documents\\WindowsPowerShell\\profile.ps1
%UserProfile%\\My Documents\\WindowsPowerShell\\Microsoft.PowerShell_profile.ps1
For more information, see “Windows PowerShell Profiles”:
http://msdn2.microsoft.com/en-us/library/bb613488.aspx