@littlek,
littlek wrote:I ran chkdsk (whatever it was) and I watched it run, but it produced no log. No errors. It deleted two files.
That's good. It suggests there's no physical problem with your hard disk for chkdsk to log. It was the boot logging option I was expecting a log from. Did you get around to activating it yet?
$300-400? I suppose you basically can choose between three product categories: Netbooks, the trailing edge of current notebooks, and refurbished notebooks. Personally, I dislike the small screens of netbooks, though it may not be an issue if you can hook it up to your current monitor. (Oh, speak of the devil: Have we ruled out yet that your monitor is the culprit for those psychedelic patterns? I don't see where yet. Can you connect your computer with some other monitor in the house, or your monitor to a different computer?)
I also dislike the risk factors of buying used and refurbished laptops. You never know what hidden defects they may have. On top of that, a Munich friend of mine got burned because his "pre-owned" laptop turned out to have been stolen from its pre-owner. Not a typical case, but possible. But your risk preference may differ; if it does, I saw some decent-looking options by searching Amazon.com for "laptop" and selecting a $200-$400 price range.
Personally, I would go with new, low-end laptops. The ones that looked best to me so far were the ones
I found at bestbuy.com.
I suspect all this basically restates what you figured out by yourself anyway. But that's how far I got.