The 'WINDOWS.OLD' folder will save you a lot of time and grief! The 'windows.old' folder should definitely not be dreaded! I wish I had read about it before wasting a lot of time. I spent several hours backing up my files to DVDs (which is still recommended when possible) only to find out there...
When you download the file (by selecting "download only" on the HP website) and save it to a folder, what you have downloaded is a "self-extracting file" that contains other files. When you double-click on it, it extracts all its contents into a new folder. By default this folder is located in...