(tl;dr version is here http://www.tomshardware.com/forum/forum2.php?config=tomshardwareus.inc&cat=28&post=347079&page=1&p=1&sondage=0&owntopic=1&trash=&trash_post=&print=0&numreponse=0"e_only=0&new=0&nojs=0#t2643974 which ironically is even longer). Built a new comp on Saturday; When I first built it it ran great, nothing out of ordinary. That night I noticed Core 1 was always 60+% usage no matter what. googled it, it let me to find out it's Hardware Interrupts which I read A LOT of threads and tries hundreds of different things about. ATM I am downloading a different Windows CD to see if maybe my Windows is just jacked up, but if that isn't the case I'm not sure what to do. Brought the PC to work with me today to work on it and for the first 3 hours, the problem was actually completely gone. At some point in between me being in the office, and in the room where it is, it came back. I've run XPerf and I have the graph but in all honesty I have no idea what I'm looking for. I've been using LatencyMon to track it, and earlier it wasn't coming back with any errors (For once) until I ran something then the same 3 as usual came up. USBbus.sys, atapi.sys (or Iastor.sys depending is I have Windows or Intel's IDE drivers), and HDAudBus.sys . I'm -really- hoping it isn't hardware, especially since it's gone away a couple times. I've tried switching around all hardware, formatting on different drives, etc etc. Some of these drivers though I'm not sure how to "fix". For instance Uninstalling USB drivers just makes me unable to do anything, (I tried using a PS2 mouse but still didn't fix my issue). Is there anyone who can read XPerf sheets or can give me guidance? If it IS hardware (I assume it'd be the mobo) I can hopefully take it back and exchange it tonight. I was just really excited about using it, and so far I've just been staying up until 2/3AM every night working on it. Thanks ~ Slow at work so I'll be checking back/replying as soon as as answer/tip is provided.