Hi PA Bear:
Thanks for your offer of assistance, but all I want to do at the moment is to reach out to Win 7 and Vista users affected by these slow Windows Updates and let them know that a temporary workaround has been posted on Dalai's webpage ***Search for Windows Updates takes forever? - A possible solution***. Many Vista users, including myself, have seen the initial "Checking for updates..." phase of WU hang for several hours during Patch Tuesday updates since Windows 10 was officially released in July 2015. The svchost.exe process consumes high amounts of CPU (i.e., complete saturation of one core of the CPU) while "Checking for updates..." runs, and my post <here> shows that all that CPU is consumed by the Windows Update service (wuauserv) and an underlying thread for the Windows Update Agent (wuaueng.dll). Excerpts from my WindowsUpdate.log are posted in post # 162 of ScousaJAY's VistaForums thread windows update just seems to hang while checking where many affected Vista users have been sharing observations and links to relevant information since this problem began in August 2015.
From what I've read in various forums and IT blogs it sounds as if Win 7 and Vista users won't have permanent solution for these slow Windows Updates until Microsoft steps up and addresses the problem from their end. I don't know if that fix would come in the form of a patch for the Windows Update Agent (the latest WUA v7.6.7600.256 for Vista was released June 2012) or whether Microsoft needs to expire some of the outdated updates in their supersedence chain for programs like the IE browser and the MS .NET Framework, but I don't want to waste any more time running further diagnostics on my local machine if the problem originates on the backend Microsoft servers.
My posts in this thread from 16-May-2016 forward summarize my understanding of the current status of this issue.
32-bit Vista Home Premium SP2 * Firefox v46.0.1 * IE9 * NIS v21.7.0.11 * MBAM Premium v2.2.1
HP Pavilion dv6835ca, Intel Core2Duo T5550 @ 1.83 GHz, 3 GB RAM, NVIDIA GeForce 8400M GS