Windows 8.1 won't install

Hello! I have a problem with installing Windows 8.1 x86 on an older PC. Before I had Windows XP x86 installed on that system (it worked fine). PART I: When I try installing Windows 8.1 (Professional, 32-bit) it all goes well up until after I create partitions, format and chose where to install Windows. Then it starts installing and then it reboots for the first time. Then, when it's...