...a new folder with a file named: "msxml4-KB927978-enu.log" or maybe "msxml6-KB927977-enu-x86.log"inside? If that's the case, then the folder and file are the logs for the recent Windows Update for MSXL4 or 6... They can be deleted safely although they only take a little space and aren't actually doing anything after the installation of the update finishes.

As to the "HP Web Helper", if you don't want it, I believe it can be uninstalled in the Control Panel/Add-Remove Programs.

Hope this helps.