So...you did a memory upgrade and suddenly a new update (KB929777)
appears. You try too install it...again and again..it fails with ERROR CODE
8000FFFF. Here is the fix....put away the screwdriver and forget about taking
out the modules.
Go to Control Panel(classic view), Windows Update, Review Update
History,click on installed updates(blue text at the top), Find (KB929777),
right click and uninstall it. Reboot the computer. After re-start go to
Control Panel, Check For Updates, (KB929777) should be there...if
not...download it from Microsoft Updates and save it to desktop. Download and
install (KB929777). Re-boot and your life is back to normal and you will
never have another bad day!