Finder Shows a "Scrambled" Screen After Mavericks Install

Question

Installed Mavericks last night. Everything went fine except for the "completing installation" (after the machine reboots) where I got a message telling me "less than a minute to go" even though it took close to an hour. But it did finish and I was excited.
After the install, and prior to going to bed, I noticed that everything on the machine was very slow, performance-wise. But I was also aware that Spotlight was probably re-indexing my entire machine and didn't worry.
Just got up and decided to check out the machine. Performance-wise, it seems to be back to normal. However, just as I was about to breathe a big sigh of relief, I am noticing that the Finder (and only the finder so far, no issues with any other software that I've noticed) is having some major display issues. For instance, lets say I'm in my Downloads folder. Everything is in list format (my preference) nice, normal and neat. But if I grab a file (just a random JPG) and throw it in the trash... well, as soon as I do that everything goes berserk in that Finder window.
Have tried toggling the display options at the top of the window (icons, cover flow, etc...) and while it will change what shows up in the window, it is still scrambled. Ditto for navigating to a new window. If I choose desktop (currently empty) I get a plain white window but if I show any other folder with content in it, its the same scrambled view.
What's more is that when I attempted to take a screenshot, it doesn't render the scrambling, just puts a gray window in place of where the scrambling effect was. I have included that screenshot here and then I also took a literal photograph of my screen and attached that as well.
Can anyone help? I'm afraid of rebooting my machine for fear of making the problem worse. And I foolishly did not do all of the back-up steps recommended before a Mavericks install, so that may limit my options moving forward. Ugh.
Any help would be much appreciated.

Answer 1

Man, I'm afraid to say it but it is starting to look like the Finder glitch thing is the least of my worries. After spending a couple of hours on my Mac, I'm finding that my earlier statement about speeds being back to normal was incorrect. Everything is SLOOOOOW. Even typing in this Window is taking forever becuase there's a long lag, characters jumping, etc...
This seems to extend everywhere. Web pages are incredibly slow to load now. Apps are taking forever to load. It just took 90+ seconds to open Safari. Ugh.
A day ago I had a lightning fast machine with a reliable OSX that had never given me a single issue. Now I've got a slow, glitchy POS that wouldn't come out on top if it was facing off against a 10 year-old HP. Thanks a lot, Apple.