I had windows vista home premium sp2 64 bits
And NIS 17.5
It's no problem at all; you can delete the Norton installer after installing Norton (if you are referring to the Norton installation files after installing NIS 2010 via the Norton Update Center/Download Manager). If you require the NIS 2010 installation package in the future, or want to save it as a backup, then you can fetch it from over here:
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