Prior to SWS 7.5 SP1 HF3, SWS utilized a shortcut link called VZRock.lnk to initiate a Windows Explorer refresh.
In some cases, end users will see this zero byte link pop up on their desktop then disappear. This is working as designed and is not a virus or indication of an issue.
SWS no longer utilizes this method as of SWS 7.5 SP1 HF3. This upgrade can be downloaded from HOWTO109516.