WULoader.exe
(Microsoft)
Microsofts Windows Update Critical Update loader. This task will only appear in your Task List if you installed the Microsoft Critical Update Notification (via a Windows Update in most cases). In addition to the well publicised "Invalid Page Fault" problems with WULOADER, two other downsides are that WULOADER by default accesses the Microsoft website every 5 minutes and, when it is running, ScanDisk and Defrag will restart endlessly and will not be able to complete.