This might be a long shot, but i remember my little brother having serious trouble with an on-board firewall that came with an nvidia chipset on his mobo. If you have one of these, it might be worth disabling it trough your bios.
Other stuff that might be worth doing, posting the name of your mobo(psu, cpu, gpu, ram & mobo, one of these is usually the culprit in case of hardware problems). Posting whatever your tried last night to solve the problem, if only to avoid redundant questions/remarks.
off-topic: awesome though it may be, that xkcd flowchart has little to do with actual hardware problems.
edit: Maybe a complete list of components might be usefull, i would assume PC world provided you with a convenient list of the components you bought.