A couple of years ago I upgraded from XP to Windows 8 when Microsoft where charging £30 for the upgrade, which seemed to be a no brainer. Two years down the line my Dell Precision desktop feels sluggish compared to how it was performing with a fresh install (upgrade) to Windows 8 (I have since upgraded to Windows 8.1). The solution appears simple, Refresh your PC without affecting your files. Exactly what I want to do. Click on it..wait a few and then get the message "Insert Media, some files are missing, your Windows installation or recovery media will provide these files". Which installation or recovery media? Never had any. Plan B, download installation/recovery media from Microsoft. Result...I insert my Windows product key and get the message that my key is an upgrade key and cannot be used for a fresh installation. I don't really want to re-install, just refresh. Haven't I paid Microsoft enough money to allow me to refresh my installation? Any ideas?