Required trusted root certificates

This article lists the trusted root certificates that are required by Windows operating systems. These trusted root certificates are required for the operating system to run correctly.

Original product version:   Windows 7 Service Pack 1, Windows Server 2012 R2
Original KB number:   293781

Summary

As part of a public key infrastructure (PKI) trust management procedure, some administrators may decide to remove trusted root certificates from a Windows-based domain, a Windows-based server, or a Windows-based client. However, the root certificates that are listed in the Necessary and trusted root certificates section in this article are required for the operating system to operate correctly. Because removal of the following certificates may limit functionality of the operating system or may cause the computer to fail, you should not remove them.

Necessary and trusted root certificates

The following certificates are necessary and trusted in Windows 7, in Windows Vista, in Windows Server 2008 R2, and in Windows Server 2008:

Issued to Issued by Serial number Expiration date Intended purposes Friendly name Status
Microsoft Root Authority Microsoft Root Authority 00c1008b3c3c8811d13ef663ecdf40 12/31/2020 All Microsoft Root Authority R
Thawte Timestamping CA Thawte Timestamping CA 00 12/31/2020 Time Stamping Thawte Timestamping CA R
Microsoft Root Certificate Authority Microsoft Root Certificate Authority 79ad16a14aa0a5ad4c7358f407132e65 5/9/2021 All Microsoft Root Certificate Authority R

The follow certificates are necessary and trusted in Windows XP and in Windows Server 2003:

Issued to Issued by Serial number Expiration date Intended purposes Friendly name Status
Copyright (c) 1997 Microsoft Corp. Copyright (c) 1997 Microsoft Corp. 01 12/30/1999 Time Stamping Microsoft Timestamp Root R
Microsoft Authenticode(tm) Root Authority Microsoft Authenticode(tm) Root Authority 01 12/31/1999 Secure E-mail, Code Signing Microsoft Authenticode(tm) Root R
Microsoft Root Authority Microsoft Root Authority 00c1008b3c3c8811d13ef663ecdf40 12/31/2020 All Microsoft Root Authority R
NO LIABILITY ACCEPTED, (c)97 VeriSign, Inc. NO LIABILITY ACCEPTED, (c)97 VeriSign, Inc. 4a19d2388c82591ca55d735f155ddca3 1/7/2004 Time Stamping VeriSign Time Stamping CA R
VeriSign Commercial Software Publishers CA VeriSign Commercial Software Publishers CA 03c78f37db9228df3cbb1aad82fa6710 1/7/2004 Secure E-mail, Code Signing VeriSign Commercial Software Publishers CA R
Thawte Timestamping CA Thawte Timestamping CA 00 12/31/2020 Time Stamping Thawte Timestamping CA R
Microsoft Root Certificate Authority Microsoft Root Certificate Authority 79ad16a14aa0a5ad4c7358f407132e65 5/9/2021 All Microsoft Root Certificate Authority R

The follow certificates are necessary and trusted in Microsoft Windows 2000:

Issued to Issued by Serial number Expiration date Intended purposes Friendly name Status
Copyright (c) 1997 Microsoft Corp. Copyright (c) 1997 Microsoft Corp. 01 12/30/1999 Time Stamping Microsoft Timestamp Root R
Microsoft Authenticode(tm) Root Authority Microsoft Authenticode(tm) Root Authority 01 12/31/1999 Secure E-mail, Code Signing Microsoft Authenticode(tm) Root R
Microsoft Root Authority Microsoft Root Authority 00c1008b3c3c8811d13ef663ecdf40 12/31/2020 All Microsoft Root Authority R
NO LIABILITY ACCEPTED, (c)97 VeriSign, Inc. NO LIABILITY ACCEPTED, (c)97 VeriSign, Inc. 4a19d2388c82591ca55d735f155ddca3 1/7/2004 Time Stamping VeriSign Time Stamping CA R
VeriSign Commercial Software Publishers CA VeriSign Commercial Software Publishers CA 03c78f37db9228df3cbb1aad82fa6710 1/7/2004 Secure E-mail, Code Signing VeriSign Commercial Software Publishers CA R
Thawte Timestamping CA Thawte Timestamping CA 00 12/31/2020 Time Stamping Thawte Timestamping CA R

Some certificates that are listed in the previous tables have expired. However, these certificates are necessary for backward compatibility. Even if there is an expired trusted root certificate, anything that was signed by using that certificate before the expiration date requires that the trusted root certificate is validated. As long as expired certificates are not revoked, they can be used to validate anything that was signed before their expiration.