DavidR
8
I think it may be Spyware Terminator that Alan is mistaking/quoting as it is a resident anti-spyware option and I believe it has a start-up blocker function. However, the paid for version of SuperAntiSpyware is resident, I have had no problems with the free version of this product on-demand only.
No matter what anti-spyware or security based program you are going to use you should fully familiarise yourself with its various settings and how they might impact on other programs. If a setting has a blocking function, ensure you set it to ask rather than automatically block without notification.