Server lock up

[Mich]

I've got a server that every morning, sometime between 7am and 9am, will completely lock up. The only thing I can do to recover is hard boot the server. A huge problem with this is that there is absolutely NOTHING in the logs. As far as Windows is concerned everything is running fine. This server delivers images to users through a virtual directory and there are no scheduled tasks.

I caught it as it was locking up this morning and this might give someone a clue as to what my problem is. End user called and said they didn't have images. I RDP'd into the server and everything seemed fine until I opened Computer Management and clicked on the virtual directory. As soon as I clicked on the virtual directory the whole server locked up. I couldn't do anything and eventually had to hard boot.

I know I'm not giving a lot to go on, but that is because I don't have anything. Anyone have any ideas what the problem is or how I can dig deeper?

-If it ain't broke, break it and make it better.

 

[porkchopexpress]

What happens between 7 and 9?

Does a process put the images in a directory and how do the users collect them. IIS?

 

[bicyleman9008]

If you open Task Manager before the lock up can you then see cpu usage or process usage %

 

[Mich]

Nothing happens between 7 and 9. This server is a conduit using a JaQI app to pull images from our image archive system and supply them to a 3rd party app. The JaQI resides in the virtual directory and calls are made to it from the app.

-If it ain't broke, break it and make it better.

 

[Mich]

CPU usage hovers around 1 to 2 percent. I checked that this morning.

-If it ain't broke, break it and make it better.

 

[porkchopexpress]

It might be worth monitoring with taskman and proces explorer about that time.

http://www.sysinternals.com/Utilities/ProcessExplorer.html

 

[Mich]

OK, I tried that, but I still don't see anything. The logs are clear and I can't see ANYTHING going on in Task Manager or Process Explorer. Locally everything looks normal except I cannot access the taskbar.

-If it ain't broke, break it and make it better.