Check whether the case, full width and half width are correct when entering, and the entered password must be exactly the same as the set password.

In addition, please note whether the password you modified is the same account as the qq number you are currently operating.

Different input methods will lead to different characters being input. Please switch your input method to "English input mode" and enter your password.

If you enter a numeric password on the keyboard, please confirm whether to open the keyboard. To open the keyboard, press the "num lock" key in the upper left corner of the keyboard.

Clean the computer and kill virus.

Restart your computer or mobile phone and log in again.

How to modify QQ payment password:

Log in to QQ on your mobile phone.

Click on the QQ avatar in the upper left corner and select "QQ Wallet" in the pop-up menu.

After entering the QQ wallet page, select "wallet account".

After entering the wallet account, click on the three horizontal lines in the upper right corner, and select "Password Management"-modify the payment password in the pop-up menu.

Enter the old Tenpay payment password, and then click Next.

Then, follow the instructions on the page to modify the payment password.