Hi Sumit"), just wanted to update you.
I successfully updated to 1903 build, after performing the below steps...
- Go to your RSA machine keys folder: C:\Users\All Users\Application Data\Microsoft\Crypto\RSA\MachineKeys
- Find a machine key (file) whose name starts with d6d986f09a1ee04e24c949879fdb506c_*. If you open it using notepad, you should see plain text "NetFrameworkConfigurationKey".
- Backup this file to some other folder.
- Delete this file.
- Following the same steps as 2-4 to backup and delete iisWasKey: 76944fb33636aeddb9590521c2e8815a_*
- Following the same steps as 2-4 to backup and delete iisConfigurationKey: 6de9cb26d2b98c01ec4e9e8b34824aa2_*