也许您已经有一段时间遇到过这个问题了。您只是忘记先解密文件，而是直接将加密形式的文件复制到另一台Windows计算机。现在，当您尝试在另一台计算机上打开它时，您会收到一条消息，指出Access is denied。如果您在打开加密文件时收到拒绝访问^{(Access is denied)}消息，您可能需要先导出加密文件系统 (EFS)^{(Encrypting File System (EFS))}证书和密钥。发生这种情况是因为您没有查看文件的权限，或者用于加密文件的密钥可能不在另一台计算机上。

如果您右键单击其属性 >安全^(Security)选项卡并发现您没有权限，您可能需要联系您的系统管理员。但如果文件来自另一台计算机，则需要从加密文件的计算机获取密钥。如果文件被其他人加密，则该人需要将证书添加到文件中，然后您才能访问它。

这是有关如何执行此操作的分步教程

从另一台计算机获取加密密钥

您需要先在文件被加密的计算机上导出加密文件系统 (EFS) 证书和密钥^{(Encrypting File System (EFS) certificate and key)}，然后在将文件传输到的计算机上导入它们。

导出 EFS 证书和密钥

2. 在左侧窗格中，双击Personal，单击Certificates，然后单击要导出的EFS 证书。^{(EFS certificate)}

4. 在证书导出^{(Certificate Export)}向导中，单击下一步^(Next)。

5. 点击是^(Yes)，导出私钥，然后点击下一步^(Next)。

6. 单击个人信息交换^{( Personal Information Exchange)}，然后单击下一步^(Next)。

7. 输入您要使用的密码，确认，然后点击下一步^(Next)。

8. 导出过程会创建一个文件来存储证书。键入文件名和位置（包括整个路径），或单击浏览^(Browse)，导航到一个位置，键入文件名，然后单击保存^(Save)。

9. 单击下一步^(Next)，然后单击完成^(Finish)。

导入 EFS 证书和密钥

1. 转到控制面板^{(Control Panel)}并搜索 证书管理器 ^{(Certificate Manager )}并打开它。

2. 在左侧窗格中，单击个人^(Personal)。

5. 键入包含证书的文件的位置，或单击浏览^(Browse)，导航到文件的位置，然后单击下一步^(Next)。

6. 输入密码^(password)，选中将此密钥标记为可导出^{(Mark this key as exportable)}复选框，然后单击下一步^(Next)。（不要选中启用强私钥保护^{(Enable strong private key protection)}复选框。）

7. 单击将^(Place)所有证书放入以下存储中，选择个人^(Personal)，然后单击下一步^(Next)。

8. 单击完成^(Finish)。

将证书添加到加密文件

要将您的加密证书和密钥添加到文件中，请按照上述步骤导出您的证书和密钥，并让您从中接收文件的人导入证书和密钥，然后按照以下步骤将其添加到文件中.

1. 右键单击​​加密文件，然后单击属性^(Properties)。

2. 单击常规^(General)选项卡，然后单击高级^(Advanced)。

4. 在出现的对话框中，单击添加^(Add)。

5. 单击证书^{(certificate)}，然后在四个打开的对话框中单击确定。^(OK)

I hope that helps!

How to open an Encrypted File if Access Is Denied in Windows 11/10

Maybe yоu have faced this problem some time. You jυst forget to decrypt the file first аnd instead directly copied the file in its еncrypted form to another Windows computer. Now when you try to open it on the other computer, you get a message saуing that Access is denied. If you get Access is denied message when opening encrypted files, you may need to first export the Encrypting File System (EFS) certificate and key. This occurs because either you do not have permission to view the file or the key that was used to encrypt the file is probably not on the other computer.

If you right-click its Properties > Security tab and find that you do not have permission, you may have to contact your system administrator. But if the file is from another computer, you need to get the key from the computer where you encrypted the file. If the file was encrypted by someone else, that person will need to add the certificate to the file before you can access it.

Here is a step by step tutorial on how to do this

Get an encryption key from another computer

You need to first export the Encrypting File System (EFS) certificate and key on the computer where the files were encrypted, and then import them on the computer that you transferred the files to.

Export the EFS certificate and key

2. In the left pane, double-click Personal, click Certificates, and then click the EFS certificate that you want to export.

4. In the Certificate Export wizard, click Next.

5. Click Yes, export the private key, and then click Next.

6. Click Personal Information Exchange, and then click Next.

7. Type the password you want to use, confirm it, and then click Next.

8. The export process creates a file to store the certificate in. Type a name for the file and the location (include the whole path), or click Browse, navigate to a location, type a file name, and then click Save.

9. Click Next, and then click Finish.

Import the EFS certificate and key

1. Go to Control Panel and search for Certificate Manager and open it.

2. In the left pane, click Personal.

5. Type the location of the file that contains the certificate, or click Browse, navigate to the file’s location, and then click Next.

6. Type the password, select the Mark this key as exportable checkbox, and then click Next. (Do not select the Enable strong private key protection checkbox.)

7. Click Place all certificates in the following store, choose Personal and then click Next.

8. Click Finish.

Add a certificate to an encrypted file

To add your encryption certificate and the key to a file, export your certificate and key by following the steps above and have the person that you received the file from, import the certificate and key, and then add it to the file by following these steps.

1. Right-click the encrypted file, and then click Properties.

2. Click the General tab, and then click Advanced.

4. In the dialog box that appears, click Add.

5. Click the certificate, and then click OK in each of the four open dialog boxes.

I hope that helps!

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