Once you have installed Office 2010 you may notice the Microsoft Office Upload Center appearing in your Notification Area Icons.
To remove the icon from the notification area change the following registry setting:
“0” = hidden
“1” = displayed
What is Microsoft Office Upload Center:
Microsoft Office 2010 Upload Center now gives you a way to see the state of files you’re uploading to a server, in one location. When you upload a file to a web server (this includes SharePoint), Microsoft first saves that file locally to the Office Document Cache before it starts the upload, which means that you can save changes and immediately continue working even when you are offline or have a bad network connection. The Microsoft Office Upload Center lets you keep track of how uploads are progressing, and whether any files need your attention.