I'm posting this because I haven't actually found a solution in the archived forum posts.
The Intel® SDK for OpenCL™ Applications for Windows* is in my Products list and I have a serial number displayed for it. I have received an email after registration and proceeded to download the intel_sdk_for_opencl_applications_2020.1.396.
During installation I input my serial number and get an error that says:
"Registration failed for unknown reason. Please go to www.intel.com/software/products/support/ for your support options"
Nothing that I've tried has worked. Any help with this would be much appreciated. Thanks.