Touch pad is not working

【help】
T440p Windows 7
bought it in this March.
touch pad is not working.
"ThinkPad UltraNav Pointing Device  is unenabled " is said by  "Lenovo Solution Center"
when open the device manager, Ultranav device can not be found in "Mouse"
the driver of the  ThinkPad UltraNav is intalled well by  "Lenovo Solution Center"
I can not use my touch pad even restart my PC.
BTW, sometimes the keyboard can not working suddenly.
in that case, when i restart my PC, the keyboard becomes woking.
Best wishes, any idear will be welcomed.
Thanks in advance.

Hi Epco_yangchao,
Welcome to Lenovo Community!
As per the query we understood that you are facing an issue with Touchpad on your ThinkPad T440p.
Boot the system in safe mode and work for a while to confirm if it is working in safe mode.
Uninstall UltraNav application for Control panel – Program and feature option and restart the system and check if you’re able to see any adapter in Device Manager under Mouse adapter.
Hope this helps.
Best regards,
Hemanth Kumar
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