For the last 3 days, I have been living within Windows Update. I am changing my machine from a 32bit version to 64bit version of Windows 7. This is the professional version of Windows 7, nicely installed from an original DVD exactly the way Microsoft want us to do. It has been 3 days in the making, I cannot count the numbers of restarts and it is still to be completed.
If you really have to do this, if your DVD contains Windows 7 SP1, do not use Windows Update.
Go download the July 2016 update rollup for Windows 7 SP1 and then start the update using Windows Update. Note that this rollup update is a nearly 600MB download.
Why going through this pain? This is to be able to build the new Cheméo Studio and deliver it for both 32 and 64 platforms.