I want to edit a .BNDL file in windows 7 but when I open it with notepad or Microsoft Office 2010, I get a file with weird characters.
Is there a way to edit this file in windows?
As far as my research shows, a BNDL file can be one of two things:
Sinni800's answer has it right, but he didn't post any software to open this file
For first file type (Game Bundle File) you can use EA Layer 3 Decoder
You should try using website like FileExntesion.org, you can find there actual list of software to support unknown file extensions.