Hi
CCleaner is free, I'm guessing that there is almost no one on this forum who doesn't use it, (I don't know anyone who doesn't use it) it's been around since 2004. I think they are over 32,000,000 downloads.
It gets updated regularly and will keep you computer free of junk, temp files, etc.
I don't use the registry cleaner unless I've uninstalled something but then it gets rid of the left behind registry entries.
Allow it to make a backup when you do the registry clean.
It lets you change start-up items etc, risk free, if it doesn't work out all you have to do it recheck the item.
You can chose exactly what it does, but the default settings work for me.
If you just want to monitor what cookies you have you can do that.
If you've never removed them you probably have a lot of them.
Here's a review and a download link.
CCleaner - CNET Download.com
You will find Cookies under Options.
Mike