We have to remember two things about this law: 1) it's "for defects present at the time of sale" (as you stated), and this leads to various (mis)interpretation

We have to remember two things about this law: 1) it's "for defects present at the time of sale" (as you stated), and this leads to various (mis)interpretations (like "how can i demonstrate that a non working hard disk was already not perfect at the time of sale and that's not my fault, or just the normal effect of the time and usage?) 2) it's valid only for consumers, so if you're a business and you buy anything using your VAT account, you're not covered by this law and you must stick to the typical commercial warranty (in Italy it is minimum 1 year)