Windows cannot verify the digital signature for the drivers required for this device in windows 7

Question

I have a driver software I compiled to support my USB device in windows 7. Few years ago, I was using a Digicert code signing certificate to sign this driver software. That certificate was using SHA1 digest alg. When this certificate expired, I had to purchase another certificate from them as I needed to rebuild my driver. The new certificate is based on SHA256 digest as SHA1 is deprecated now. As my target platform is a legacy windows 7 OS, I installed SHA-2 code signing support as documented in Microsoft portal ([2019 SHA-2 Code Signing Support requirement for Windows and WSUS - Microsoft Support]).

I’m able to install the driver software. However, when I connect the device, it appears with warning “Windows cannot verify the digital signature for the drivers required for this device”. Any help on this is hugely appreciated.