Well...i did just like in the tutorial above. Loader didnt find software at all.
Ok. on your PC go to start>control panel>add remove programs. You should see two blue blackberry icons one for desktop software and one for the new operating system. If you have more than 2 delete the old operating system program. If you only have the two symbols then go to start and type vendor in the search bar and if something shows up right click it and delete it. Then empty recycle bin and restart pc.
Ok. I know you've probably gone through the steps again, but try this.
Remove all OS's, Desktop Managers, anything RIM related. Another place to check for leftover RIM files, C:\Program Files\Common Files\Research In Motion\ <-- List every folder you have in this directory in a new post.