The next step is to uninstall QQ20 10 that is not available on the computer. You can try to delete it by following these steps:
Start-Settings-Control Panel-Add and Remove Programs, find the QQ installer in Add and Remove Programs, and then delete it. If you can't delete the QQ installer normally or you can't find it, you can open the C drive of my computer, follow the following path C:\Program Files\Tencent\QQ to find the QQ installer, and directly delete all files in this folder.
After completing the above actions, you can install the QQ software you downloaded.