I have just purchased a Pavillion B&O from Vodacom in South Africa. I have my own Microsoft Software. I uninstalled the Office version that came with the laptop (30 day trial) and installed my own Microsoft Office 2016 Proffessional Plus package. When opening excel for the first time the system asked me to input the serial number which I did and happily carried on working and saving spreadsheets. After closing excel and opening again i was once again asked to register the software? This has never happened before? it also happens with all the other Microsoft software i.e Outlook etc. Please help.