According to your description, I suggest you refer to the following information:
1. I suggest you update the touchpad driver. Since the system version and model are not mentioned in your problem description, I suggest you refer to the following official documents to find the driver:
/zh/support-drivers/e support/as CPPS . html
I hope the above reply can help you.
If the above information can't solve your problem, you can log on to www.hp.com.cn/chat,, the online chat room of HP Network, and ask an online engineer to help you solve the problem further. More product information is available in www.hp.com.cn/800..