http://go4download.com/search/+compaq+presario+c500+video+drivers The Presario C500 is powered by an Intel 1.7Ghz Celeron Mobile processor. It may not be fast, but it gets the job done. The unit comes with 512MB RAM as standard and it has a spare memory slot so you can easily upgrade -- running Vista can be memory hungry, and so a minimum of 1GB is recommended -- even for the Basic version.
See this Amp at http://amplify.com/u/btar2
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