Can I remove startup application "UpdaterUI.exe - Networks Associates Common User Interface" to speedup my computer and reduce security risk?

Startup application UpdaterUI.exe is the Common User Interface installed as part of Networks Associates products like McAfee VirusScan. You should keep shstat.exe as a startup application.

UpdaterUI.exe startup configuration info:

Name: UpdaterUI 
Command: C:\Program Files\Network Associates\Common 
   Framework\UpdaterUI.exe
Location: HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Registry name: McAfeeUpdaterUI

UpdaterUI.exe process and program file info:

CPU usage: 00%
Memory usage: 376K
Launching method: Windows Startup - UpdateUI
Directory: C:\Program Files\Network Associates\Common ...
   Framework
File name: UpdaterUI.exe
Description: Common User Interface
Size: 139,347 bytes
Date: Tuesday, February 25, 2003, 6:00:00 AM
Version: 3.0.0.595
Company name: Networks Associates
System essential: No
Virus/Spyware/Adware: No