Install the package which you have downloaded from the Lenovo Support page to Install.
This issue has been fixed from188.8.131.52 UltraNav driver onwards.
- (New) Added support for ThinkPad X220,X220i,X220 Tablet,X220i Tablet.
- (New) Added support for ThinkPad Edge E220s,E420,E520.
- (Fix) Fixed an issue where the wheel setting in the Mouse properties would
revert to the same setting as before when scrolling on the Internet
- (Fix) Fixed an issue where the memory usage rate continued to increase by