Debugging Modified System Files

[Dibya]

Any one can help me. Some unknown reason causing bsod with my modified Kernel32.dll.

I wish to debug it . So question how can i shoot out problem with debugger

[CamTron]

I'm not really sure what kind of thing you're doing, but the Windows SDKs come with plenty of debugging tools such as WinDbg and KD. https://msdn.microsoft.com/en-us/library/windows/hardware/ff551063(v=vs.85).aspx

SoftIce was a popular one way back when, and it's completely invisible to the OS, but it only works with Windows XP and earlier, and Windows 9x.