I have recently installed version 2004 and everything is working fine.My boot time is still the same as before the update which is 24 seconds.I cannot imagine what it feels like to have to wait 15 minutes.The best change i ever made was to install a ssd drive.
Im have an ssd as boot drive before I installed update, suggested steps did not solve issue, except a clean install.
Thank your very much for your input. It would appear a SSD might resolve my problem - you and several other posts attest. My laptop (Asus) is a few years old so no doubt I would need to weigh the age factor against the cost of a new drive. I don't have the necessary tools or knowledge to do the upgrade so I would also need to weigh professional upgrade costs against a new laptop. Frustrating as my laptop runs fine after the inordinate bootup time - albeit after following some other advice and making changes to services.msc the laptop is running slower.