Start up entries

I cant delete start up entries in CCleaner.I cant even shut them with a yes or no.I tried reistalling but no good.Same thing.Can anyone help?

Welcome Marcbear

What operating system are you running, are you the only user on the system and are you running as Administrator?

Welcome Marcbear

What operating system are you running, are you the only user on the system and are you running as Administrator?

I'm running as administrator

XP Pro

Service pack 3

on a petium 4

comodo firewall

anti VIR

super antispyware

spyware blaster

Is there a particular startup entry you are trying to delete as some entries protect themselves.?

What steps are you doing in CCleaner to try and do this?

I have to ask this so please forgive me :) Are you highlighting the entry first by clicking on it?