As a Newbie here I am not sure if I posted this on the wrong section so please forgive the duplication. I purchased from Amazon Win10 Pro on a USB Datastick. My current set-up is as follows. Toshiba Satellite S50T A117 Laptop running Windows 8.1 which works properly. ùP is i7 2.4Ghz Ram 16.0GB 15.9 usable System 64 Bit x64 based processor. 765Gb of free space on Drive C HDD I paid for the USB Stick of Win 10 Pro from Amazon and will probably return it for a refund. Why didn't they stick to CD-ROM as the vehicle as was the case with Win 8.1 which I also bought about 18 months ago and worked beautifully, It seems to me that either this particular USB Drive may have defective or missing files or that the script to install the software from it onto the HDD of the PC is badly written as it appears to run properly to begin with even asking for the Product Code Number, displaying the customary EULA, and asking if one wants a new install or an upgrade. Once the selection is made, in my case an upgrade, it shows a screen saying amongst other things to REMOVE the USB Stick from the socket and reboot the PC then once it has booted up to re-insert the stick and the installation will restart. THIS DOES NOT HAPPEN. At this stage the only way to reboot the PC is to press the off button in effect to crash it and when it does re-boot it is back on the HDD under Win 8.1 and whatever was in Memory from the USB stick is lost and the whole process would start again. Surely whoever wrote this programme would have included an on screen button to appear on the screen which would perform a soft re-boot of the PC without it being actually switched off? Also the entire process is very clunky as many users would not know how to access the BIOS on the PC and change the boot order to USB before HDD. The Install program should have been written to run from the USB stick ab-initio or as I say they should have stuck to using a CD-ROM as the vehicle for the software. I am wondering if I have to install the free download of Win 10, which I am dubious about doing as I have been told it is a cut-down version with many features missing, then use the USB stick to upgrade to Win 10 PRO or forget the whole idea and stick with Win 8.1 for all its faults and wait till I buy a new laptop at the end of the year with Win 10 pre-installed? If anyone who is a computer expert be that amateur or professional out there has a work-round for this problem or can tell me what I am doing wrong I'd be very grateful to them. I would also add that I tried setting up a directory on the PCs HDD and copying all the files from the USB Stick to that then trying to run the Install from there but all I got after a couple of screens was that I couldn't run Set-Up from a USB Drive. I am reasonably Computer literate but I am not a programmer. Has anyone been successful installing from a USB Drive and can they tell me what I am doing wrong? Microsoft's Website is NOT a lot of use on this problem.