Hi, morlaine there.
Before you starting removing 4Sync, you can try to disable it at Startup or on WTM. Moreover, you can google the video guide for 4Sync uninstall and follow more tips in the blog entry.
Somehow this piece of software got installed on my computer. I have tried everything I can think of except using Regedit to uninstall it and nothing works. It wouldn't uninstall itself. When I tried through the Control Panel, 4sync opens and the control panel says it is open and must be closed before uninstalling, I close it, it opens again, and the infinite loop continues with the bottom line being, it never uninstalls. I contacted 4sync Tech Support and explained what I had tried and they wrote back and told me to try those very same things. I got the feeling it was an automated response because it certainly wasn't helpful. I doubt that they even read my email. I tried contacting them a second time and have never received a response.
Any suggestions would be greatly appreciated. Thanks, morlaine