Recently, I discovered that the taskbar had a icon of Baidu Pan, a cloud storage service, even though I had already stopped using it. Upon further inspection, I found that there was no feature to quit the program, leading to the program running in the background and making me hunt for a solution to kill the process. It's quite frustrating to encounter such a seemingly straightforward issue, and I hope that by sharing my experience, others might find it helpful in resolving similar problems.