What must be the configuration of an operating system to install digital signature software? Product Content Team June 21, 2022 11:23 Updated You must have a 64-bit operating system to install the digital signature software. Related Links: Product Update - To read our product update, click here. Video - To learn more about greytHR, click here. Related articles Why am I not able to upload Form 16 for a rejoined employee? Why am I not able to view the batch in digital signature software? Not able to sign the form 16 document digitally from the admin login?