You can use Windows Explorer to sort files by name, size, file type, or date modified. But for some reason Microsoft doesn't give you the option to sort by file extension. CPExt does.

In order to install CPExt, you need to download and unzip the installer to a temporary folder. Right click on the file marked CPExt.inf and select install. Once you reboot your system you'll be able to add an Ext column by right-clicking on a column in Windows Explorer and choosing "more" from the drop down menu. And then you can proceed to systematically delete every EXE file on your hard drive and make your computer practically unusable. So umm... proceed with caution.

[via gHacks]