I have to agree with Tech, when your system becomes bogged down with security applications you spend an awfully long time keeping them up to date not to mention the intrusion some of them bring, death by pop-up asking permission and for those without experience continually answering yes seems to be a problem.
I tried BOClean and it lasted a whole hour before I uninstalled it, you can't run an on-demand scan, its configuration is I feel limited and I hadn't got a clue what it was meant to do, zero help file and sod all in the way of what it does on the web site. I will not install security applications where I have limited controls and worse still don't know what it does or how it works.
The same cyberhawk didn't last long either. I once downloaded sandboxie but never got around to installing it, as a dial-up user if I abandoned the browser cache every time my browsing would be slower continually having to load images that would otherwise be in the cache. I know it is possible to have it work with the live cache, bookmarks, etc. but to my mind that kind of defeats the purpose of it. That was the main reason I didn't bother to install it.
Have a back-up and Recovery strategy or be prepared for the grief and hassle that a re-installation ot format causes. The one application type I would recommend that isn't a security application is a dick imaging tool, Drive Image (for me) or True Image, etc. This has hauled my a** out of the fire on a number of occasions, none of which were as a result of virus infection.
Whatever you install on your system you have to be able to live with it, you control it not the other way round.