Qq said it can't be deleted.

1. This may be caused by unsuccessful data retrieval. So I suggest you clear IE cache, which can effectively improve the speed of computer access to websites. When the operation is finished, please close the current webpage and try again.

The method of clearing IE cache is as follows:

2. It is suggested to optimize the system performance. You can use QQ computer housekeeper, super rabbit and so on.

I hope it will help you, and I hope it will be adopted. Thank you!