wupdt.exe definition, relationships, removal:

The wupdt.exe file is installed and used by adware IEPlugin and aurora.The wupdt.exe file usually runs the same named process.

This process silently works in background and performs harmful actions. It remains active while wupdt.exe is present in the system. Removing the file will immediately terminate a process and prevent it from running later. That is why you have to manually delete the wupdt.exe file.

If you cannot erase it, consider using recommended spyware removers, which will get rid of wupdt.exe and associated parasites for you.