Im also having this problem. i had W7, but i wanted to keep up with my classes and software so i upgraded to 8.1. however upgrading to W8.1 made me loose alot of software like my microsoft office, Adobe, Itunes etc. this was fusterating but i still had all my files, like my documents, music files, photos etc. but the biggest problem came when the upgrade also deleted my antivirus and malware software, so accessing the internet only gave me the worst spam and viruses ive ever had to deal with. it casued so much problems that my only option after faild attempts of removing them was to reboot my laptop and start over. i saved all my data to a external hard drive using the new file history that came with W8.1. it was new so i doubled verified i was doing the correct thing to make sure i was going to have all my data afterwards. once i restarted my W8.1 i also had the oportunity to download W10 for free. said it would take much to move over to the new software, but as it so happens, i now cant access any of my music files or documents. ive searched over every forum on here about information reguarding this issue that so many others like me have had. ive tried every trick, every example, every sugestion, anything anyone has said to recover lost data, like my music, and all i get is " you dont have premission to access". at this point i feel hopeless, years of documents and music i have had over 12 years just out of my reach and i cant do a damn thing. if anyone could shed some light and actually help me solve this, i would kiss you.