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Java consuming 100% of my CPU

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My apologies for this being the first post I make on these forums, I'll make up for it, promise.

On August 1, 2009, I was forced to install an update for Vista (64 bit). I did so just before going to sleep for the night. The next morning I went onto my computer, opened eclipse, and ran a project I was working on. For some reason, my computer began to stall a bit. So I opened Task Manager only to find that my CPU was running at 100%, with Javaw.exe consuming a steady 98% of it.

My system specs shouldn't matter, but here - 2.00GHz processor, and 3.75GB RAM.

I've also tried programs that my old computer (512MB RAM) would run with ease, but still get extremely high CPU on this computer.

I've restarted my computer, uninstalled and reinstalled java, tried running a 'simple' program that would just loop and sleep, and running the program from
the command prompt.

I'm sorry if this is a little sloppy, I'm just frustrated and unsure how to explain the situation easily.
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