You have no infections on that PC, but you can boot in safe mode,
run HJT and 'fix' any of these
O4 that you don't use/require.
DO 'fix' the O9 and O16 though.
And do NOT delete any of those 'fixed' files!
O4 - HKLM\..\Run: [EAPCISetup] c:\windows\SYSTEM\wizard.exe c:\windows\SYSTEM
-- Part of the Creative Soundblaster PIC Installation Wizard. Probably left as a result of a failed installation
O4 - HKLM\..\Run: [HPScanPatch] C:\WINDOWS\SYSTEM\HPScanFix.exe
-- Automatically fixes earlier versions of Scanjet 5100c software. If not used anymore, remove.
O4 - HKLM\..\Run: [OEMCleanup] C:\WINDOWS\OPTIONS\OEMRESET.EXE
-- Resets OEM installation settings at bootup. Not required unless you're new to PC's
O4 - HKLM\..\Run: [mdac_runonce] C:\WINDOWS\SYSTEM\runonce.exe
-- Associated with MS Data Access Components (MDAC). Sometimes left over after installation - not required.
O4 - HKLM\..\Run: [QuickTime Task] C:\WINDOWS\SYSTEM\QTTASK.EXE
-- System Tray access to Apple's "Quick Time" viewer from version 5 onwards
O4 - HKLM\..\Run: [COMSMDEXE] comsmd.exe -off
-- 3Com tray icon
O4 - HKLM\..\Run: [CriticalUpdate] c:\windows\SYSTEM\wucrtupd.exe -startup
-- Windows Critical Update Notification. If you want to keep Windows up-to-date (W98 no longer supported by MS)
O4 - HKLM\..\RunServices: [EncMonitor] C:\Program Files\Encompass\Monitor.exe
-- This is the Connect Direct Program. It is more trouble than it is worth and few use it
O9 - Extra button: (no name) - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - (no file)
O16 - DPF: {4ED9DDF0-7479-4BBE-9335-5A1EDB1D8A21} (McAfee.com Operating System Class) -
http://download.mcafee.com/molbin/shared/mcinsctl/en-us/4,0,0,90/mcinsctl.cab
O16 - DPF: {BCC0FF27-31D9-4614-A68E-C18E1ADA4389} (DwnldGroupMgr Class) -
http://download.mcafee.com/molbin/shared/mcgdmgr/en-us/1,0,0,23/mcgdmgr.cab
