Logga in med Microsoft
Logga in eller skapa ett konto.
Hej,
Välj ett annat konto.
Du har flera konton
Välj det konto som du vill logga in med.
Engelska
Vi beklagar. Den här artikeln är inte tillgänglig på ditt språk.

This article also applies to the following:

  • Microsoft .NET Framework 3.5

Summary

Customers who run .NET Framework applications that rely on Transport Layer Security (TLS) 1.2, such as Intuit QuickBooks Desktop, may experience connectivity failures after they upgrade their system to a newer version of Windows.

Symptoms

Consider the following scenario:

In this scenario, you observe connectivity failures after the upgrade. The failures may include, but are not limited to, the following exception message and inner exception message:

System.Net.Http.HttpRequestException: An error occurred while sending the request.

System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)

Cause

This problem occurs because the SchUseStrongCrypto flag is not preserved throughout the Windows upgrade process.

Workaround

To work around this problem, use one of the following methods.

Workaround 1

Re-enable TLS 1.2 support as a machine-wide default protocol by setting the SchUseStrongCryptoregistry key flag that has a DWORD value of 1, as follows:

HKEY_LOCAL_MACHINE\SOFTWARE\[Wow6432Node\]Microsoft\.NETFramework\<VERSION>: SchUseStrongCrypto

Note You must add "[Wow6432Node\]" if the application runs as a 32-bit process on a 64-bit operating system, and set <VERSION> to either v4.0.30319 (for .NET Framework 4 and later versions) or v2.0.50727 (for .NET Framework 3.5).

Workaround 2

Enable TLS 1.2 support for your particular application (not machine-wide) by using an AppContext switch in the "<runtime>" section of your config file, as follows:

<runtime>

<AppContextSwitchOverrides value="Switch.System.Net.DontEnableSchUseStrongCrypto=false" />

</runtime>

Note By using this switch, you you can avoid this problem from recurring in future Windows upgrades because the setting will be correctly persisted.

Status

Microsoft has now resolved this issue for some devices. An update is available on Microsoft’s Update Catalog as of August 16, 2018 for those customers who have Intuit QuickBooks installed.

These customers may also check for updates on Windows Update by going to Settings > Update & Security > Windows Update and selecting Check for updates.

For devices that do not have Intuit QuickBooks installed and who are experiencing this issue:  Microsoft is working on a resolution and will provide an update in an upcoming release. 

 

Behöver du mer hjälp?

Vill du ha fler alternativ?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Hade du nytta av den här informationen?

Vad påverkade din upplevelse?
Genom att trycka på skicka, kommer din feedback att användas för att förbättra Microsofts produkter och tjänster. IT-administratören kan samla in denna data. Sekretesspolicy.

Tack för din feedback!

×