Credit Repair Service Where do I download Product Updates? A:""Invalid User String"" means you are entering an incorrect name and code. This usually occurs when trying to ""retype"" the name and code we sent. Please try to ""copy and paste"" the name and code (instead of retyping) and you should have success. FYI: To cut and paste: Use Control + C to COPY and Control + V (Or Right Mouse Click + Paste) to PASTE it into...... Similar Editorial : Windshield Chip Repair Service by Mark Carpenter. | Source : Computer Monitor Problems