Explorer crashes

Hello,

Can anyone help me with this, please. I was in the process of converting a movie from MP4 to AVI on my desktop and Explorer all of the sudden crashes. It then continues to restart and crash several times before it finally freezes my desktop. I restarted Windows Vista and explorer crashes and restarts over and over again upon start up. I have no way of using the start menu, right click won't work because of explorer, I only have one profile to access my computer, and there's a file on my desktop that I believe is causing Explorer to crash, but no way of deleting it. Is there anyway to create another profile or access the files on my desktop without going through Explorer?

Thanks so much in advance!
 
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