What is ICO File Extension?

Overview

You can detect the file extension in your Windows system because it is used as computer icons. Images stored in the Start menu, Desktop and Windows contains the file extension. It is capable of storing PNG and BMP images.

Category

An ICO file is actually an image holding file or image file efficiently holds icons of Windows apps.

Supportive Apps

Any 32-bit OS versions but the version should be above Windows Vista

Company

The developer of the file extension is none other than the tech giant Microsoft.

MIME Type

It has various MIME types which are categorized.

Microsoft-

image/x-icon

IANA-

image/vnd.microsoft.icon

Others-

image/icon

image/ico

application/ico

text/ico

File Signature

00 00 01 00

Location

It is saved in a different location for Windows 7 and 10.

For Windows 7-

  • C:\Windows\system32\imageres.dll
  • %windir%\explorer.exe

For Windows 10

  • %systemroot%\system32\netshell.dll
  • %systemroot%\system32\netcenter.dll
  • %systemroot%\system32\imageres.dll
  • %systemroot%\system32\networkexplorer.dll
  • %systemroot%\system32\mmres.dll
  • %systemroot%\system32\mmcndmgr.dll
  • %systemroot%\system32\ddores.dll
  • %systemroot%\system32\accessibilitycpl.dll
  • %systemroot%\explorer.exe
  • %systemroot%\system32\moricons.dll
  • %systemroot%\system32\gameux.dll
  • %systemroot%\system32\pifmgr.dll
  • %systemroot%\system32\shell32.dll

How to Access ICO File Extension

Windows users can access ICO files using any free image programs.