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#21
card readers on laptops/prebuilt machines often require you to visit the manufacturers site for the drivers.
if dell don't have the windows 7 drivers listed then try the vista drivers.
the optical drive issue is different, but again make sure you visit the dell website and get chipset drivers and intel storage managment drivers, make sure the smbus is installed.
while windows 7 does install drivers for most devices they are not often the correct ones but merely legacy style drivers to get you by untill you install the correct ones.