When you open the file location nothing is supposed to happen. You are simply opening up the location on the drive.
That can be a large help if you do get struck with a malware of some type at times however since you can at least the malware exe file over to a new location if not able to delete it on the spot until you can boot up in safe mode.
As for the xbundle_offer.exe no information found besides an info request in Chinese and most likely something Winamps put in there to offer a full version. I haven't had Winamps on for some time now but never found any bugs to worry about being packed into it. Bing used here!