Need good debugger

[[mm]]

Hi,
I'm looking for a good 64-Bit debugger that can assemble 64-Bit instructions. I tried Microsofts WinDbg, but as it seems this debugger can only assemble 32-Bit instructions (disassembling 64-Bit instructions works however). I'd also prefer a command-line tool, any tips?

[GUAN DE DIO]

I'm working with IDA PRO 5.2

      It's a very good decompiler and it has support for 64bit. I don't know if it is possible to assembly 64 bits instruction but I bet for it.

GUAN

[[mm]]

I tried the IDA PRO 5.3 Demo and the 4.9 Freeware, but both versions crashed with an Access Violation on startup. I guess it's because I'm using vista...

[BogdanOntanu]

WinDbg has a special 64bits version, search and download the correct version for your OS.

[GUAN DE DIO]

That's strange.

   I have a lot of friends working with IDA PRO 5.2 in Vista. I work with WinXP 64 now.

   Do you have Administrator privilege ?

GUAN