BlackScreen With Mouse Pointer

I have 5 computers with same following config.
I am using windows XP (fresh Installed).
Processor Q9650 , 4G M.M , 8400GS 512mb Graphic.
I was using Metatrader Application for back testing.
My app was crunching the numbers for last 5 days on all the machines.
After four days two of my computers are stuck on windows blackscreen with mouse pointer. I could only move mouse nothing else like ctrl+alt+del works.
Though all computers have same hardware same software configuration.
and they are running the same job.
Any suggestion for described problem... thnks

 

Sounds like a software problem.

Are you using metatrader 4 or 5?

There are some discussions in their forums about certain builds causing crashes. You might want to peruse the metatrader forums for your version. You might need to upgrade or downgrade to another build of the software.

 

thnks
I am suing mt4-208.
But the think is that hardware is same mt4 are same on all computers. The only part I don't understand is why 2 of my pieces get stuck.
thkns again I am going to mt4 fourms. tooo thkns