Windows 8.1 refusing to install.

Hello,

I am trying to install Windows 8.1 onto my computer.
Reminders keep asking me if i want to install 8.1 , so i thought i would try it out.
I have tried to install 8.1 three times, but everytime, it fails.
It begins with the downloading, and with that, all is fine. Then it tells me it is installing 8.1 .
It goes through the process of installing, no problem, but when it has to restart after installation, it informs me that, "Windows 8.1 has failed to install correctly, and will now restore the previous version of Windows".
I then end up with what i originally had, Windows 8.

I would like to install Windows 8.1, so can anyone tell me, why my computer is refusing this installation?

Thank you.

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8, 64 bit
Processor: AMD E-300 APU with Radeon(tm) HD Graphics, AMD64 Family 20 Model 2 Stepping 0
Processor Count: 2
RAM: 3678 Mb
Graphics Card: AMD Radeon HD 6300 series Graphics, 384 Mb
Hard Drives: C: Total - 294105 MB, Free - 235590 MB;
Motherboard: TOSHIBA, Portable PC
Antivirus: Windows Defender, Disabled