This Syntek USB WiFi dongle is over 10 years old. Its support appears to have been terminated in 2013 and no drivers for Windows 8.1 or Windows 10 were ever produced. I am afraid you are out of luck. That said, USB WiFi dongles are available from numerous sources and can be had pretty cheap (~US$12).
Thank you for posting on the Intel® communities.
We hope that the information provided by the community has been helpful to clarify your concern. We noticed that this inquiry is regarding a third-party USB Wireless dongle so we will proceed to close this inquiry now from our end. Communications with community peers may continue, but if you need any additional information from Intel, please submit a new question as this thread will no longer being monitored.
Intel Customer Support Technician