The reason why it takes a long time is because vista is loading it into the RAM, perhaps turning off 'superfetch ' may help but I doubt it. I use large DVD's to store files and at times it can be frustratingly slow at opening the disk as once again all the files are being loaded into the RAM... You could also try opening device manager, look under disk drives and right click the set up found there. Choose properties and then policies. Near the bottom of the revealed box is another way to increase disk performance so try ticking that.

You could try more RAM....lol

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