.PS1 File Extension

Script, or "cmdlet," used by Windows PowerShell, a Windows shell program built on Microsoft's .NET Framework; contains a series of lines written in the PowerShell scripting language; similar to a .BAT or .CMD file, but executed by Windows PowerShell instead of the Windows CMD.EXE and COMMAND.COM programs.

Cmdlets can be used to automate Windows tasks. For example, a cmdlet may rename a group of files to use a new file extension. Another cmdlet may examine the Windows registry and output results to a file. Cmdlets also support aliases, pipelines, and named and positional parameters for commands.

Windows PowerShell is installed by default on Windows 7.

NOTE: Be careful when executing PS1 scripts since they may contain functions that access critical Windows operating system components.

System file created by Microsoft Windows' Indexing Service feature, which creates an index of searchable file information; commonly created in the C:\System Volume Information\catalog.wci\ directory and contains data that helps the operating system perform quicker searches.