In Windows 10, how to change username for the following seemingly broken state?
I changed my user name, say from xxx to xxxy in my Windows 10 computer following the instruction in https://www.groovypost.com/howto/change-account-name-windows-10/#:~:text=Press%20Windows%20key%20%2B%20R%2C%20type,again%20to%20confirm%20the%20change. But after installing Tencent QQ, a popular messenger app in China and Asia, when it starts, it complains that it could not access
C:\Users\xxx\OneDrive\Documents\Tencent Files\
But my new username is xxxy! And then the program could NOT be started. Any suggestion how I might be able to fix this?