When upgrading operating systems, the very first thing to do is check your hardware ... I do not have 7 but I have been around since Windows 2. Every version of Windows since 95 has said to check your hardware first. Later versions have made it easier ... to the point you can have your computer evaluated by Microsoft, (and others) the result being you get a report of hardware and software you may have to upgrade. I presume you have not done this.
Microsoft has a complete list of hardware and software that is Windows 7 compatible. I suggest the first thing you do now, before you go looking for new drivers, is review this listing. You will find it here:
http://www.microsoft.com/windows/compatibility/windows-7/en-us/default.aspx If your device is compatible, it will be on the list. If there is a new driver, you will get instructions on how to get it. If it is not listed, there is no readily available cure - you will have to upgrade your device. You can, of course, visit the site of the manufacturer of your device. In my experience, they will tell you the same thing as you will learn from the Compatability list. The benefit of visiting the manufacturer is they MAY offer you a deal on a upgraded product.
Good luck with your search. Thanks for your visit @ FixYa.com today.