well thanks for treating me like i'm an idiot.
and the file is C:\Windows\Branding\shellbrd\shellbrd.dll
it's the windows logo in the control panel at
Control panel\system and security\system.
i don't want it to be circular, because my logo get's cut off when the frame is circular.
yeah i could resize it, but it looks like crap resized.
i fixed it, here is the final version.