|emachines computers do not normally come with Recovery disks. |
If you can get the Recovery disks, they're often quite cheap.
Your chances are good since the computer isn't all that old.
It (they) may be shipped to you in as little as a few days, depending on which shipping option you choose.
Check for Recovery disk availability -
PC Recovery Media Purchase Program
Otherwise, the Product Key on the official Microsoft label will only work with a regular Microsoft OEM VISTA DVD
A regular Microsoft OEM Vista DVD has all the versions of Vista on it, whatever labelling it has on it - which version you can load depends on which Product Key you have (or at least, all the 32 bit versions, or all the 64 bit versions) .
If you know someone who has a generic system that has Vista on it , or somone who has loaded Vista on a system that did not originally have Vista, they may have a regular Microsoft OEM Vista DVD.
A regular Microsoft OEM Vista DVD has "For distribution with a new PC only" or very similar printed on it.
All operating system re-installation CDs or DVDs that come with, or that are meant for use with, brand name computers are OEM, but the situation is different - the re-installation DVD that came with a different brand name computer, or most models of the same brand, will probably NOT load Vista on your computer - it will probably check the brand of the bios version, or check for a particular mboard, one of a small group of models, and refuse to load Vista if it doesn't find something suitable.
If you don't know of anyone who has a regular Microsoft OEM Vista DVD, you could buy one, but it's probably cheaper to buy the Recovery disk(s) if it's (they're) available, even after including the shipping cost.
For that matter, if you buy an OEM DVD, don't bother with buying a Vista one!! Get a Windows 7 one - there's not much difference in price (a Windows 7 one may be cheaper) , and Windows 7 is very much like Vista, with all the things that annoyed people about Vista either taken out of it or re-configured to be more user friendly - it's what Vista should have been in the first place.
You get the OEM DVDs either on the web, or from a local place that builds custom computers and has lots of computer parts and software. Big box stores, etc., usually have only the Retail versions, which cost more than the OEM versions. The difference is that you provide your own support if you get an OEM version - if the brand name supplied a re-installation CD or DVD, it has an OEM license and they provide the support to you - Retail versions come with an available limited time and amount of direct support from Microsoft.