Steps to troubleshoot the error code 40402 in your Yahoo messenger
Step 1: Firstly you are required to delete and remove all the cache memory of your Yahoo messenger.
Step 2: If after clearing the cache memory also does not help then you should follow the further steps which are applicable to Windows 7, 10 and vista.
Step 3: Now open your messenger and go to the bottom of the screen and you will see a smile and click on the smiley and then click on “exit” option.
Step 4: After this tap on “start” button and then go to “all programs” and then on “command prompt”.
Step 5: You will see a list of commands copy and paste each command in the window prompt and tap “enter” and run the command and restart the computer. If you need Yahoo technical support to find the commands then contacts the experts.
Ring to experts via Yahoo support number toll-free for support
If you are still facing this error even after following the steps then you need to take support from experts and for that connect with us through Yahoo support number +1-888-254-4408 toll-free.