windows 10 - How to disable HTTP/2 on IIS 10

Question

IIS 10 claims to fully support HTTP/2. I'm wondering if there is a way to turn off HTTP/2 on IIS 10.

Answer 1

To disable HTTP/2 on Windows 10 HTTP.SYS, set the following registry value on the Windows 10 desktop in HKEY_LOCAL_MACHINESystemCurrentControlSetServicesHTTPParameters

EnableHttp2Tls REG_DWORD 0

EnableHttp2Cleartext REG_DWORD 0

The second of these is only necessary if the failure is with HTTP. The first is for HTTPS.