Having logins or web address problems? Mind your Pp, Qq, Bb, and Dd? Letter Oo or number 0 (zero)? 1. Double-check everything! 2. No place for space, my friend! 3. Watch for tricky letter or symbols 4. Try exact capitalization after forward slash (/) 5. Use the address bar instead of searching CapsLock on? L, l or I, I or number 1?