I am going to link you to one of many threads on this forum with info concerning registry cleaners. http://ths.gardenweb.com/forums/load/comphelp/msg0115134014907.html?13 If you search the forum you will find more. I personally never advise the use of any type of registry cleaner period unless done by a registry specialist.

Windows 7 comes in four versions - Starter, Home Premium, Professional, and Ultimate. Each of those four versions have different features included. SP refers to Service Pack, which is a major update for Windows (and other software including Microsoft Office). Those updates may include performance and security improvements, support for new hardware, and in some cases new features. So you have Windows 7 Starter Edition with Service Pack 1. For Windows 7, SP1 is the only service pack released so far.

Never mind the 'inpet senior' Shaddy, you are doing just fine and you have come a long way in the last few months.Keep asking questions till you are satisfied. Regarding running Ccleaner, just click on the link DA has provided. Now look at the capital C with the paint brush across it. You should have that same icon on your desktop if you did a straight install. Close the link now. If you have the icon on your desktop double click on it and a new window appears. Look in the bottom right corner and click where it says 'Run Cleaner'. There is nothing else to do until it finishes then you just close the program. You may also have an icon on the Quicklaunch bar near the Start button if you have the Quicklaunch bar enabled. When you run Ccleaner you will lose all your cookies as the program is designed to do. However if you remain logged in at sites like this one that can be annoying. You can stop that easily. Here's how. Open Ccleaner Click Options on the left side Click the Cookies box Now you have a list of Cookies to delete. Look down the list carefully and find any you do not want removed, like 'gardenweb' Click on one to highlight it Then click the right facing arrow to send it to the 'Cookies to keep' window Repeat as needed. Done.

Janette as DA said if you just run the cleaner in it's default setting it is ok, but it does have a registry cleaner built into it also and that is what I personally do not like to use. You could simply stay away from that part and not use the registry cleaner aspect. why don't you take a look through the ccleaner beginners guide that might help you. CCleaner Beginner's Guide The Cleaning Process Always good to read up on a program and learn all about it prior to using it, those links should help. Remember also that if you have it delete your cookies then when you go to some sites that had remembered your info that will be gone because you deleted the cookie that kept that info, like log in info to this site. Also if you like to keep your history of the sites you have been too in your browser you may not want to select to have it clear that, same with the auto complete feature.