Muzapp.exe

I am using COMODO firewall but not the virus checker. It had been telling me for a while there are updates but kept failing to download them, so I deleted the old one and and installed the newest version. During installation Comodo ran a malware check and came up with following report:

.~A(ID = 0x66d829) C:\Documents and Settings\Annika\Desktop\Downloaded Programs\Anti-Spyware\setup files\ComboFix.exe:UPX:Unsfx:327882R2FWJFW\NirCmd.cfexe
Application.Win32.NirCmd.~A(ID = 0x66d829) C:\Documents and Settings\Annika\Desktop\Downloaded Programs\Anti-Spyware\setup files\ComboFix.exe:UPX:Unsfx:327882R2FWJFW\nircmd.com
ApplicUnsaf.Win32.Adware.PsExec.A(ID = 0x19082a) C:\Documents and Settings\Annika\Desktop\Downloaded Programs\Anti-Spyware\setup files\ComboFix.exe:UPX:Unsfx:327882R2FWJFW\psexec.cfexe
Application.Win32.NirCmd.~A(ID = 0x66d829) C:\Documents and Settings\Annika\My Documents\COLLEGE\Other\Anti-Spyware\setup files\ComboFix.exe:UPX:Unsfx:327882R2FWJFW\NirCmd.cfexe
Application.Win32.NirCmd.~A(ID = 0x66d829) C:\Documents and Settings\Annika\My Documents\COLLEGE\Other\Anti-Spyware\setup files\ComboFix.exe:UPX:Unsfx:327882R2FWJFW\nircmd.com
ApplicUnsaf.Win32.Adware.PsExec.A(ID = 0x19082a) C:\Documents and Settings\Annika\My Documents\COLLEGE\Other\Anti-Spyware\setup files\ComboFix.exe:UPX:Unsfx:327882R2FWJFW\psexec.cfexe
TrojWare.Win32.TrojanDropper.Agent.~ZAZ(ID = 0x2d0bc6) C:\Program Files\Samsung\Samsung Media Studio 5\muzapp.exe

Alsthought these programs have been in my computer for a long while neither AVG nor SuperAntispyware have found anything wrong. Without thinking I started deleteing all the "malware" without thinking but with the last one I paused to research the net: it seems that muzapp is not malware. However, according to one website it was first reported 2008, yet I bought the mp3 player (and it's associated software) in summer 2007.

Now I am wondering is muzapp rogue or not... and what about the other ones? Am I getting mixed up with some antispyware I've read is a rogue one or are Combofix and MGtools ok? (As it happens, I had not installed them yet, so if they're rogue ones...)