1. Boot safe mode and head to device manager to remove, delete all mice in device manager. On reboot Windows will scan and add your mouse.
2. Scan for malware with Grif's advice at http://www.cnet.com/forums/discussions/how-to-remove-pup-option-603542/#post-f742c795-5881-433b-a29b-6d758efe5cd3
After I updated to Windows 10, I realize the mouse is not as smooth as it is used to be. Then I download some programs to run test and I find out that after 4-5 Right-Click, the next Right-Click would turn into a Left-Click (random probability).
I tried using another mouse, and the result is more suprising. Instead of becoming a Left-Click, it becomes a R-Button. The rate is like 10-11 Right-Click.
Please help me solve this problem. Thank you.