content: As with any upgrade things can go wrong. Nobody can guarantee all your existing programs will work without problems. To be safe I would either:   (if you really want to upgrade) Do a full system backup before upgrading   (preferred option) Dual boot and install Windows 10 in a fresh partition, then only install the programs you need when you need them. Good way to clean out the cruft from your previous system too. When everything is alright for a couple of months then remove the old partition.