I'm sure I need one, but which ones are effective and which ones can be trusted not to be a scam and give me malware of some type? I've read some reviews that say the vast majority of registry cleaners are ineffective and that many of them actually make performance worse. The thing that got me started on this is I often can't open the Read More sections in Yahoo news articles. Oh, running Win 7 and Firefox with the usual No Script and other security add ons and blockers. But I have everything "allowed" that No script lists in the drop down window. Also running Zone Alarm free firewall and AdAware free. Also using Advanced System Care 9 free. Have read it's decent at least. With all I read of how sneaky the ransomware creeps are, it pretty near makes a person paranoid about downloading anything. Would sure appreciate some recommendations. Then I could feel more confident that the app is at least legit and safe and probly reasonably effective. Thanks!!