hmmmm.....

I was checking out tech specs for dell laptops this morning, and came across this:

Weight & Dimensions
Weight: Starting at 1.79 kg6 Width: 31.8cm Height: 2.21cm – 3.38cm Depth: 23.8cm

and at the footnote:
⁶ Preliminary target weight is based on 13.3" WLED display, Genuine Windows Vista® Home Premium, Slot-load DVD burner and 4-cell battery. Weights vary depending on configurations and manufacturing variability.

i wonder, will the total weight become lighter if i downgrade to Windows XP? hahaha...