Set WU at NEVER. Leave it that way. This does not mean you never update. It simply means never do it automatically and that you accept the responsibility, and take control of the process.
Periodically, take a look at www.askwoody.com Woody Leonhard is the expert of all experts on WU. He consults with a large band of experts. On his page you will see his MS-Defcon rating. If it is 2 or below, do NOT do any updates.
If you are an average Joe, as I think you are implying, you want to use the A plan. That means you accept any and all updates that MS wants you to have installed. If that be the case, when the time is right, start and run WU. You may find that your security software gets in the way. If it does, you may have to temporarily remove it.
If however you want to follow the B route, you still can do that. One of Woody's group has put a page up that really makes it simple: https://www.askwoody.com/forums/topic/2000002-ongoing-list-of-group-b-monthly-updates-for-win7-and-8-1/
When you re-installed your system, you should have follow through with WU all the way. That includes SP1. SP1 is very necessary. If you have not done that, it is time to do so. I am including the process I use to do a new install at the end of this response. Timing is not right, but you can follow most of it.
- I do this all the time. I have done hundreds. This is likely to take an elapsed time of around 12 hours.
- First go to your computer’s OEM support site and find and download the drivers for your computer and store them on a USB stick.
- From this point onward, I am providing you with the process to install Windows 7.
- You may be able to take your data off first. Remove the failing hard drive and put it into a USB external drive housing. Connect to a working PC, copy the data off. You may need a friend to do this part for you, but the rest is not really very technical or difficult for most people.
- Install the new hard drive.
- Do not do any formatting or partitioning.
- If you made a set of disks for recovery or an image copy at the time your computer was new. This is the time you need them.
- Start your computer on the first of the disks as instructed and in an hour or so, your computer will look exactly as it did then.
- If you do not have that set of disks. You will need a legal reusable Microsoft Product Key. You will need a Windows 7 install disk. The win7 disk must match the edition of your product key, and its bitness (32 or 64). If you do not have the original Windows 7 install disk, borrow one from a friend. Hopefully, the disk you use will be labeled SP1 (Service Pack 1), because that will save you an additional 4 hours or so.
- Place the Windows 7 install disk in the disk reader and start your computer.
- Once the install process is started, choose CUSTOM. Ignore the check box about drivers, unless you can not proceed further.
- When you get to the place where it asks you where to put the installation, click Advanced and delete all partitions.
- When the installer asks about Windows update, choose Ask me later
- Do NOT install any program
- Hopefully, you started with a Win7 install disk that was SP1 (Service Pack 1). If not, run Windows Update until you get to the point that SP1 has installed itself as part of this procedure. It entails multiple Windows Update passes and restarts which you keep updating until you get there.
- Once Windows 7 SP1 is installed, install the following:
- KB3020369 Win-7 32 https://download.microsoft.com/download/C/0/8/C0823F43-BFE9-4147-9B0A-35769CBBE6B0/Windows6.1-KB3020369-x86.msu
- Win-7 64 bit https://download.microsoft.com/download/5/D/0/5D0821EB-A92D-4CA2-9020-EC41D56B074F/Windows6.1-KB3020369-x64.msu
- KB3172605 Win-7 32 bit, https://download.microsoft.com/download/C/D/5/CD5DE7B2-E857-4BD4-AA9C-6B30C3E1735A/Windows6.1-KB3172605-x86.msu
- Win-7 64 bit, https://download.microsoft.com/download/5/6/0/560504D4-F91A-4DEB-867F-C713F7821374/Windows6.1-KB3172605-x64.msu
- Open Windows Update, change Windows Update setting to Never check for updates
- Do not install anything else at this point – NOTHING
- Start the update process. It is likely to include about 200. It will take some time.
- Once you have a list of updates, you need to prevent certain specific updates from being installed to prevent Windows 10 from taking over.
- Click once on each Update that is NOT labeled SECURITY and check the date of issue on the right. If that date is after January 1, 2015, Right-click on it and hide.
- Click install updates and wait for it to finish. Restart when asked to do so.
- After re-start is complete and you see a desktop, start Task manager – Right-click on task bar. Look at the % at the bottom. Do NOT attempt to use the computer for any purpose until you see that % fall to and stay at 10% or less. Windows Update is still working and has a lot of work to do.
- Keep running Windows Update again and again till it offers no new ones.
- Start Internet Explorer, click the gear (upper right) in IE11 and select Compatibility settings and enter Microsoft.com in the list
- Start Windows Update and click the link to include updates for other Microsoft software.
- Run Windows Update again and again until you are satisfied you have all the updates you want.
- After the install is complete, check Device Manager. Type device in the text box above the start globe when you click it and choose Device manager from the list to find out if Win7 was able to supply the drivers you need. You should get drivers only from the maker of your computer or Intel. Its best to get all the drivers at this point. Win7 install may have installed all of them or nearly. Do NOT use any of those driver download sites. They are all bogus, have bad drivers, and install malware.
- Install your Microsoft Office software and then run Windows Update again and again till no more are proposed.
- Defragment your drive. Type defragment in the text box above the start globe when you click it once. Choose the Defragmentation link. Wait till it completes all passes..
- Next, you will need to take steps to prevent Windows 10 from taking over. First step is to change the Windows Update setting to NEVER. Second step is to download and install GWX Control Panel.