List of Microsoft Windows Seven's files which can be changed by Resource Hacker, a software which makes you easily to edit the file.
Approx. all Windows 7 system icons -> %windir%\System32\imageres.dll
Login Screen Background -> %windir%\System32\imageres.dll
Login Screen image resources -> %windir%\System32\authui.dll
Startup Sound -> %windir%\System32\imageres.dll
Start ORB images -> %windir%\Explorer.exe -> Bitmap -> 6801 - 6812
Windows Version Image in "About Windows" dialog box -> %windir%\Branding\Basebrd\basebrd.dll
Windows Version Image in bottom of Login Screen -> %windir%\Branding\Basebrd\basebrd.dll
Control Panel Left Sidebar Image -> %windir%\System32\Shell32.dll -> Bitmap -> 632 & 633
Getting Started (aka Welcome Center) Images -> %windir%\System32\oobefldr.dll
Laptop Battery Meter image resources -> %windir%\System32\batmeter.dll
Internet Explorer 8 (IE8) Resources -> %windir%\System32\ieframe.dll
Windows Media Player 12 (WMP12) Resources -> %windir%\System32\wmploc.dll
