Nothing on their website regarding their warranty, so it's impossible to comment if it's normal.
Please look three lines below the price in the main product description on our website for warranty info. The European distributor also has warranty info right below the description. We are not sure if the manufacturer has it on their site or not. Warranty info is very prominent on our website.
Asking if the PC sees anything in Device Manager is a standard first question for diagnosis. It has solved several "dead Airspy" issues at no cost or time loss to the customer.
We will not engage in specific support discussions on this forum other than to suggest that if our repair procedures are not acceptable, you can always send it to the manufacturer for evaluation. Our contract does not require us to handle any repairs or replacements, but we do this as a service to our customers. Except for the S/H, the entire fee is forwarded to the manufacturer along with the damaged unit and a replacement is sent to the customer. The S/H has to cover not only shipping back to the customer, but shipping to the manufacturer as well. What we charge does not cover it all, so we eat some of that cost as well.
Please - if you have any questions on our policies, ask US and do not rely on third parties to interpret them. Our contact information is on our website.
As for drivers, software, and other non-hardware matters, please visit the appropriate support forums. While we try to help our customers as much as possible, we are not as knowledgable about things we did not write and do not distribute.
In brief on the matter of policy, we have reviewed the repair policies of a couple of scanner manufacturers. Whistler specifically states that units may NOT be returned to the distributor but must be sent to the manufacturer. They require a cashiers check or MO accompany the unit in the amount if $55. The final fee may be higher. This may not be specifically for a scanner but is for one of their products. Their website seems to have no scanner-specific repair info. The above info was from a Google search for "Whistler warranty repair" (third link).
Uniden repairs scanners at a cost of $69.95 and the cost must be prepaid. Their site does not specify what payment terms are for non-warranty items, but states that repairs higher than standard repair cost will be quoted. It does not specify if prepayment of the entire amount is required or not.
Those are two electronics manufacturers many on this site will be familiar with. It appears our policies are similar, if not better for the customer. Obviously, this is not a detailed study of their policies, but does show similarities and industry norms.
It is normal for the Airspy to run warm.
Drivers are on the Airspy website.