I've been a member of RCSB for 3 years and never had much as far as login problems or any other kinds of problems. Delete your temperary internet files on a regular basis, it works for me. I have never needed to delete my cookies but if that helps you, do it. Both cookies and temp internet files get overloaded in Windows and should be cleaned out on a regular basis for all kinds of reasons, not just RCSB. You can set up Windows to delete them on a schedule so it's done automatically for you.