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SCARD_E_NO_SERVICE
SCARD_E_NO_SERVICE The Smart Card Resource Manager is not running. Without this service, PC/SC functions cannot establish the context required to enumerate readers or connect to cards.
What to check
- Check the Windows Smart Card service (
SCardSvr) and its event log entries before troubleshooting individual cards. - After the service starts again, create a new PC/SC context; previously obtained handles should not be trusted.
- If the service stops repeatedly, investigate reader-driver, minidriver, or system service failures rather than restarting it indefinitely.
Microsoft: Smart Cards for Windows service
Microsoft: SCardEstablishContext
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