Hello everyone. I just want to let you know that I am really thankful for your help. This is a 3-year old iMac version 10.4.11 I upgraded Safari as recommended a few days ago, and since then, Safari has not worked at all. At the same time, I was warned that my startup disk was full. Following the advice from some other mac help sites, I cleared the copies of my iTunes library to free space. I now have 6.72 Gigs of free space on my hard drive, but my computer is still running super slow. Just about every other thing I click on in Firefox gives me the rainbow wheel. I ran Techtools and everything passed but the Directory Scan and Volume Structure. I would be happy to copy those messages for you if that would help. As soon as a friend can loan me a hard drive, I was planning on backing up everything and re-installing. Is this the best thing to do, or is there something else to try first? Thanks everyone!