After installing CCleaner you will be asked by "CCleaner-Intelligent Cookie scan” dialog box to “intelligently scan for cookies to keep”, lot of users do click No as they don’t what this is for? what happens if you do click Yes – Intelligent Cookie scan feature will be enabled.
How to Enable Intelligent Cookie Scan feature in CCleaner
We all know whenever you visit a website, cookie will be dropped to your Computer which tracks when you visited that site and other information and sends that info back to that website server. Lot of users do delete cookies for privacy reasons where CCleaner by default does this when it runs.
Keeping All Cookies on your PC
When cookies are cleared, related sites may replace the cookie next time when you visit them. Sometimes this may not be the case those sites can forget your login data. However you can keep all cookies if you want by visiting CCleaner’s Applications tab and uncheck for Cookies for Firefox, Chrome and other browsers, do the same for Internet Explorer in Windows tab also.
You can manage cookies for all internet browsers that CCleaner supports in Cookies section. Open CCleaner>Options>Cookies. Here CCleaner lists all the cookies it deletes when you run it under “Cookies to Delete”
If you’ve enabled intelligent cookie scan, CCleaner detects cookies of Google, Gmail, Yahoo Mail and Hotmail and adds them automatically on he right-pane under “Cookies to keep” section, so that they won’t be deleted when CCleaner run by the user.
You can search for a cookie, for e.g search for “mail.google.com” (for Gmail) cookie and right-click on it and either select keep or intelligent scan option. You can do the same for other cookies you want to keep.