Problems updating windows vista service pack 1
Be sure the 3 updates below are installed first, look for them in "View Update History" when you open Windows Update from the Control Panel.
If any of these are not installed, download and manually install them.
I'd recommend not installing any 3rd party software (of any sort) until after you've got service pack 2 and all existing updates installed, but if you've got security software present it certainly should be disabled before installing the service packs.
I don't always trust that wupdate gets these installed, I always check first. I kept all these files, I found it twice as fast to get a non sp Vista updated to SP2 using the manual method, saved me so much time working on Vista re-installs.
You will receive the license code vie email within 5 minutes after payment.
I wanted to add here, also having a computer with Vista RTM in year 2015...I had to download version 7.4 of the update agent (KB946928) which did install properly.Not sure about it fixing installing Vista SP1 yet though.When you attempt to install Windows Vista service pack 1, the service pack installation wizard appears, presenting the license agreement and so on.However, shortly after the installation starts the wizard disappears.