Below are the set of drivers you are looking for:
Windows 8.1 is a preview version and there are compatibility issues with it. Unfortunately Dell currently has no support for it, though you may refer to the link http://bit.ly/16zE2WH for Windows 8.1 Preview FAQs and to the link http://bit.ly/17EWcuN for accessing the Microsoft Online Community setup to assist customers with how-to questions.
Please reply if you have any questions.
As I informed you earlier that there can be compatibility issues of the Windows 7 drivers with Windows 8.1 as it is a preview version. Also, what you can try doing is installing the drivers compatible to Windows 8 or installing Windows 7 drivers in compatibility mode. Here are the steps:
Hope this helps. Please reply if you have any questions.
Glad to know that the issue is resolved. Feel free to reach out to us if you need any assistance in future.