I need to buy a new laptop anyway so I was wondering if I completely wipe my current laptop (It's a sony vaio) could I then use it as my cold storage laptop? I plan to make a large investment in bitcoins very soon and was wondering if factory resetting my current laptop would be sufficient in terms of security? Cheers.
To answer your question: Yes, a wiped machine with disabled WiFi (as someone allready posted) can be used as cold storrage. Just make sure you format all drives before (or durring setup) installing the new OS.