I've searched here and found others with the same issue, but I'm not sure if the attempts to fix this would be the same for me. For the last 3 or 4 months, the monthly updates have been an issue. They eventually complete, but usually take days to do so. This month, I'm on my 3rd day so far with no luck. I'm using Security Essentials, and do a quick scan every early AM with a search for updates prior to scanning. That seems to be OK. Here are the specs on my cpu: HP p6110y, Windows Vista Home Premium 64 bit, Service Pack 2. Pentium Dual-Core E5300 @2.60 GHz, 6.00 GB memory (ram). Firefox 50.1.0. Would remooptimizer in the link at the top of this page be an option? An unrelated question: in a thread on here, I read that Vista will no longer be supported after 4/17. So what would be a reasonable option for me at that time? Upgrade the operating system, or a complete new cpu? Thanks for any answers.