answer:It’s hard to say. I don’t think the GPU would make much of a difference during an install, but something you may want to try is taking out some memory before trying to install again. If you’re at 4GB, bring it down to two and see if it installs then. If it doesn’t, swap the installed memory with what you took out and try again. If it eventually works doing that, then I’d say you have some defective memory. A power supply isn’t something that either works or doesn’t work. There can be fluctuations in voltage and what not, and that can also affect how the computer is working. It can also damage components that are working. Most BIOS’ have a screen that shows what’s going on with the power supply. You may want to look at yours and see if you’re getting wild fluctuations (you’ll probably see some fluctuation anyway, but you’re looking for large changes). The power supply can also affect your GPU, especially if it takes a lead from it directly. Failing that, it could be your hard drive has a problem with some bad sectors that need to be mapped out.