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Can I install OS on VB that wont be effected from my drivers/configurations on my ubuntu 9.04 / linux mint. I installed Windows XP and it can't find some drivers,when I install the same Windows on my Hard Driver it works perfect.

The answer to your question can be found in the Forum FAQ or the QuickClick FAQ, have a look there first.
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I didn't find answer to my question

Its there and called Guest Additions.