What should I do if I receive a prompt that the security certificate has not taken effect or the certificate has expired in my QQ mailbox?

Solution to QQ mail security certificate expiration:

1. Generally, certificate expiration errors are due to incorrect time, so we can modify the time. If we do not know the exact time, we can set the time on Baidu, you can see the time at that time, as shown in Figure 1:

(Figure 1)

2. Click the computer time in the lower-right corner of the computer and click change time and date settings, as shown in Figure 2:

3. Click Change date and time, as shown in figure 3:

4. Adjust the time and date of your computer based on the accurate time of Baidu time, and click "OK" to complete all the Operation steps, as shown in Figure 5:

Work und:

Method 1

1. First open the client and click the mailbox icon to open it, as shown in Figure 1:

(Figure 1)

2. Copy the link when the logon fails, as shown in figure 2:

(Figure 2)

3. Paste the link in another browser.

If it still cannot be opened, click continue to open.

Execute the command twice, as shown in Figure 3:

(Figure 3)

Method 2

1. If the security certificate does not take effect, click continue, as shown in Figure 1:

(Figure 1)

2. Once, click the second time. Force open, as shown in Figure 2:

(Figure 2)

3. Finally, the mailbox is quickly opened, as shown in Figure 3: