My suggestion would be to do a complete factory and upgrade from there; not the best solution buit one that has work for those who have done so . Remember to backup everything you can't afford to lose. Also all Apps you installed from DVDs or downloaded from the web ( Like Microsoft Office Norton will have to be reinst5alled from their original media source. Hope this helps and if you need further assistance post and we will be glad to Help you.
I would have to hear some extremely persuasive arguments for why this much time and effort would be worthwhile. I'm not an advanced computer user, my computer is a tool, and I have no interest in fixing a tool that isn't really broken. I'll live without the WIndows Updates until my computer stops functioning altogether, and then start from scratch. This has been an extremely disappointing experience with OS 8.1 and Microsoft both.