Interpreting repeated Schannel 36871 (ErrorState 10013), Print Spooler crashes, and BackgroundTransferHost TLS failures — benign config drift or security issue?

1. Version/Environment: Windows 11 workstation; Defender on; Hotspot Shield VPN present; recent updates around Sep 23, 2025; Security log retention limited.
2. Problem summary:
   • Many Schannel 36871 errors (“TLS client credential… internal error state 10013”), often tied to BackgroundTransferHost and Store/Settings processes.
   • Print Spooler service crash events; host does not require printing.
   • DNS timeout to audienceexposure[.]com noted once.
   • No clear intrusion indicators; need guidance to distinguish misconfig vs. risk, plus best-practice fixes. VS_Threat_Analysis_2025-09-30
3. Evidence (excerpts & analysis):
   • TLS client credential failures likely cipher/protocol/cert config issue vs intrusion; recommended to verify TLS 1.2/1.3, cipher policy, machine cert stores; advise on visibility and spooler hardening. VS_Threat_Analysis_2025-09-30
4. What I’ve tried: Basic review of Application/System logs, ensured Defender active; no Security.evtx export yet. VS_Threat_Analysis_2025-09-30
5. Specific questions:
   1. Are repeated 36871/10013 with BackgroundTransferHost typically harmless and resolved by SChannel/cipher policy updates — or do they warrant deeper certificate store remediation? VS_Threat_Analysis_2025-09-30
   2. For non-printing endpoints, is it Microsoft-recommended to disable Print Spooler entirely to reduce attack surface, and which GPOs harden residual print components? VS_Threat_Analysis_2025-09-30
   3. Any official Microsoft steps to correlate 36871 bursts with specific endpoints/services beyond standard Schannel logging?
6. Attachments (safe to share): “VS_Threat_Analysis_2025-09-30.md” (sanitized summary & actions).

TL;DR: Need Microsoft guidance to close out repeated Schannel 36871/10013 and confirm spooler disabling is best practice for non-printing hosts, plus any deeper diagnostics you recommend.