HpUI.exe is a malicious process related to several browser hijackers. Istart123 is one of them. HpUI is a component of PUP (potentially unwanted program).
How to Remove HpUI.exe. Should you need to remove the HpUI.exe file from your system, please proceed with the following steps. As always, exercise caution ...
Remove PUP.SupTab and Terminate HpUI.exe ; Type, PUP, adware. ; Short Description, SupTab is promoted as an application to improve the user's online experience.