I have tried to upgrade to free upgrade numerous times without success over the last 12 months. Each time I am left want me to insert a serial number. The serial number on my dongle box does not do a thing when I have tried to insert  on a few occasions I added. I have freshly reloaded from dongle disc and then upgrade with your latest 10.00?? without wanting serial number each time. Win 8 I use.

What am I doing wrong??

RCB