I assume you currently have windows 8.0. Your problem might be that you need certain updates to be installed before upgrade from 8 to 8.1 is possible. If you post a list of any updates which are being offered to you that you haven't installed, and a list of any updates you have hidden, then I can tell you if there are any which you would need to install before upgrading from 8 to 8.1 is possible.
If it isn't a matter of you not having particular updates then it could be a matter of the windows 8 to 8.1 upgrader noticing that your hardware would not be compatible with 8.1 (some hardware is compatible with 8 but not 8.1), if you post your system type (you could use speccy to get the information) someone might recognise if your system is of a type which cannot run windows 8.1.
Note that during the upgrade from 8 to 8.1 many updates will be installed, some of them (KB3035583 and KB3044374 and a few others) will need removing after the upgrading is done unless you want to subsequently switch from windows 8.1 to 10.
Also note that the upgrade from 8 to 8.1 will make any system iamges made when you had windows 8.0 unable to work, it might also make manufacturers recvery media from when you had windows 8 unable to work. You need to make new system images on external discs the moment you have upgraded, before you do anything else at all. After upgrading: don't make any changes (leave the uninstallation of any unwanted updates, if there are any you wish to remove, until after the image is made), don't install or uninstall any programs, don't even browse the web until that image is made. Then with that image made you can deal with getting your settings as you like them, deal with any installations and uninstallations of programs and updates, then make a second image and then you'll be ready to start using windows 8.1 as you previously used windows 8.
As further advice: If you already have system images now (as a windows 8 user) you might want to first restore to an image, then deal with upgrading to 8.1. This way you can ensure your system is n a well-workign and uninfected state before you begin the upgrade. Restoring from an image like this is what I did before I upgraded a windows 8 system to 8.1, doing so meant the system was in a "cleaner" state and therefore was able to upgrade to 8.1 more smoothly than if I had upgraded from my system as it was before restoring to the image. Note that restoring to an image will erase any changes made since the image was made, so backup all your files first and keep copies of the installer exe files for your programs (or note down there you got the programs from so you can install them again after upgrading).
Edited by rp88, 09 September 2015 - 03:52 PM.
Back on this site, for a while anyway, been so busy the last year.
My systems:2 laptops, intel i3 processors, windows 8.1 installed on the hard-drive and linux mint 17.3 MATE installed to USB