Where to find startup programmes?

Win 7 question. I have a few (very!) annoying programmes that load at startup and slow things down. Usually I can disable these via Msconfig's startup tab but I can't see any mention of them in the list. I have disabled everything there except my antivirus but the little blighters keep loading - so where are they to be found and why are they loading? One of them is Dell System Detect, another is Epson My Portal. I suspect they are lurking in the registry.

Does CCleaner (if you have it installed) show any different programmes at startup?

Also recommend CCleaner. If it's not there, it might be activating as a bolt-on to another process, or within a service.

I've now run CCCleaner and have zapped a lot of things. The computer seems faster and those programmes I've mentioned have gone completely. Thanks!

In Registry:
Per User:: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
For All: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

In Program Menu
Per User::C:\Documents and Settings\User\Start Menu\Programs\Startup
For All: C:\Documents and Settings\All Users\Start Menu\Programs\Startup
or equivalent for later Windows.