Hi ibrahimkerim,
As per the issue description mentioned above, you are getting windows cryptographic error when trying to sign a pdf in Acrobat Reader, is that correct?
Could you check if an update is available for your signature device? You may also visit the driver manufacturer to check for an updated driver.
Windows cryptographic service provider error, error code 2148073485
Also, try re-creating the digital ID and/or Crypto folder as suggested in the following help document and check:
Signature creation error when you sign a PDF (Adobe Acrobat 8, 9 on Windows)
You may also refer to the following forum thread discussing the similar issue:
The windows Cryptographic service provider an error: the keyset is not defined. Error code: 2148073497
Let us know if you need any help.
Shivam