hitachi 571e software

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hi , i was wondering if anyone knew how i could replace the software for this camera to get its full use,(after system crash) ie web cam etc, i had a disc and lost it, i have googled many variations too lead me to a source to replace software but had no luck. please can any one help. also in my devices it shows my vga controller a yellow triangle with "!" in it any help would be great regards njd