When you use Digital Signature Certificate (DSC) on adobe reader or any PDF Form and it shows an error like The Windows Cryptographic Service Provider reported an error: Keyset does not exist. Error code: 2148073494.

Solution:
This type of error shows in following cases:

1. Either Private Key from USB token has been deleted or
2. The driver install for Cryptographic USB Token is corrupted or
3. Driver for Cryptographic USB Token is not installed

You are requested to re-install the driver for Cryptographic USB Token if already installed and if it is not installed till yet you are requested to install the driver of Cryptographic USB Token. Still problem persist it means DSC is corrupted.