Hi,

Thanks for your advice. I have a few external casing. I have tried external casing using USB2.0, 4pin firewire, 6pin firewire. My problem still persist with or without external AC being plug in. Some of my 2.5" HD casing can be power by USB2.0 and 6pin firewire. Situation still remain unchange. My desktop replacement will have a blue-screen follow by Auto-Reboot. This will only happen when I plug in my externals when my OS is running. If I plug in my externals first then power up my PC. Everything seem fine.

I've fine the root cause of my problem by re-building my who system. That is format everything, reinstalled every application one by one and after every successful installed of application, I would try my PC with external HD. When I installed a application called "File Securer", my mentioned problems started once more. If I uninstalled this problem, everything seem fine. I decide to remove this particular problem. There's no more Blue-Screen Issue.

* File Securer is a program to lock files, programs or folder with password.
* It's a freeware that I've downloaded from CNET.
* I didn't even started using the program after installation and yet it gave a hell lots of problems.

Anyway, appreciate your reply and solution.

Cheers,
Stingrray