Varieties of P7C Files

Principal P7C Type

.P7C

Extension:	.p7c
Type:	PKCS #7 Certificate File

A P7C file is a digital certificate or ID file used by various programs like web browsers and e-mail clients for authentication. It contains a public key used to verify an entity using public-key cryptography.

Organization:	Microsoft Corporation
File Category:	Web Files
Subkey:	HKEY_CLASSES_ROOT\.p7c

Software Programs That Open The PKCS #7 Certificate File:

Microsoft Windows by Microsoft Corporation

Windows

Adobe Acrobat DC by Adobe Systems Incorporated

Windows

Mac

Linux

Certificate Manager Tool by Microsoft Corporation

Windows

Adobe Reader by Adobe Systems Incorporated

Windows

Mac

Apple Keychain Access by Apple

Mac

OS X El Capitan

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Troubleshoot P7C Files

Common Problems Opening P7C Files

Microsoft Windows Removed

You encounter an error message such as "%%os%% Can't Open P7C Files" when trying to open your P7C. Generally, this is experienced in %%os%% because Microsoft Windows isn't installed on your PC. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.

Tip: Another P7C-related program can be selected to open the file by clicking "Show Apps" and finding the application.

Microsoft Windows is Out-of-Date

Occasionally, you might have an outdated version of Microsoft Windows installed that's incompatible with your PKCS #7 Certificate File type. If you've got the wrong version of Microsoft Windows installed, you'll need to install the correct version. Your PKCS #7 Certificate File file was probably created by a newer release of Microsoft Windows than what's currently installed your computer.

Tip: Find clues on the correct software version by right-clicking your P7C file and clicking "Properties".

Regardless, most of the P7C file opening problems relate to not having the right version of Microsoft Windows installed.

Other Causes of P7C File Opening Problems

Even with the correct version of Microsoft Windows installed, you can still experience difficulties opening P7Cs. Other P7C opening errors can be created by other system problems inside of %%os%%. Issues that aren't software-related:

• P7C file references in the Windows Registry are broken
• Accidental deletion of the description of the P7C file in the Windows registry
• Defective install of a P7C program, such as Microsoft Windows
• P7C file corruption
• Malware-tainted P7C file can't be opened
• Hardware associated with P7C has outdated drivers
• Your computer does not have the adequate system resources to open the PKCS #7 Certificate File format