Actually, your adultery (assuming you've knocked boots with someone else) can certainly muddy the waters on what alimony you might be awarded (in some states, it can prevent alimony from being awarded at all). And if your STBX has been staying inside his pants, it won't look so good for you.
When was the money used to pay for them received, where did it reside, and did money earned (such as income from wages) during the marriage go into that account? If the money to pay for the laptops was received during the marriage, it might be marital property. If the money was deposited into a joint account, the laptops are marital property (or were purchased with marital funds, and so are marital property.) If marital funds (such as income from wages earned during the marriage) went into the separate account, you commingled separate and marital assets, so it'd be very difficult to later claim those funds as separate, especially since it's been so long since it was commingled.
It does not matter one whit whether your husband did or did not have any direct contact with the money when it was deposited or spent.
It depends on what was purchased and when. Just because your husband was not a joint accountholder or an authorized user does NOT necessarily make the debt separate.
And your husband can legally have access to that information one way or another, as you can be compelled (via a discovery request) to provide such things as the account balance, statements, terms, etc. and merely getting the balance, etc. isn't (as far as I know) credit card fraud.
Depending on how access was obtained, it might be a different type of fraud, if at all, but we don't have enough facts to determine that. How your husband obtained the information may have not necessarily been kosher, but he *is* entitled to that information.
The answer to the question of laws being broken is, "Probably not."
