Bulk File Rename - based on another files name.

Question

Hi Scripting Guys,
I'm sure you have dealt with questions like this before, but I haven't found a solution that will do what I want.  I have a group of driver folders that I have backed up.  Each one of these folders contains at least a .cat file and a .inf file. 
Unfortunately, all the .inf files are named oemxx.inf where xx is a different random number in each folder.  I would like to be able to rename all the .inf files to match the name of their corresponding .cat file.  This seems as if it should be easy,
but I am struggling to find an answer.
Love your work and thanks in advance.

Answer 1

I have created this PS script to do the job. I use Double Driver to back up various machines and didn't want multiple oem.inf files with the same name in my backup store. Feel free to use it.
# Powershell script to rename all the oem.inf files
# and delete the restore.ini file in each directory
# Set the $root variable to the top level path of the drivers
# Created 27th February 2015 by Mike McAnulty
Clear-Host
$root = "H:\Drivers"
$dirList = Get-ChildItem -Path $root -Recurse | Where {$_.extension -eq  ".inf"}
Write-Host "Processing... "$root -foregroundcolor "yellow"
Write-Host
Write-Host -foregroundcolor "white"
foreach ($file in $dirList)
 $catFile = Get-ChildItem -Path $file.Directory | Where {$_.extension -eq  ".cat"}
 Write-Host "Processing... "$catFile.BaseName -nonewline
 Rename-Item $file.FullName ($catFile.BaseName + ".inf") -ErrorAction SilentlyContinue
 Write-Host `t"Done...."
 Remove-Item ($file.DirectoryName + "\restore.ini") -ErrorAction SilentlyContinue
Set-Location $root