Edges of windows/sliders not appearing

When viewing any kind of menu (login, character creation, options, etc.), the edges of windows do not appear. Also, the circles that you drag in sliders, your health, and EXP do not appear. The game works perfectly on another computer, but that one lags like crazy and this one works perfectly with higher settings, otherwise I'd just use that one.

It is making it difficult to customize options and even close windows.

Pictures:
http://img21.imageshack.us/i/89175251.png/
http://img32.imageshack.us/i/50040199.png/
http://img94.imageshack.us/i/23424479.png/

Note that it is not a problem with this computer, i have ran it in the past with no problem. I has uninstalled it to save space during a long period of inactivity, and since re-installing it i have had this problem.

I choose to Verify Files every time i start up, and I have already uninstalled it and reinstalled it again. It still does this.

a DxDiag log may be useful as well and can be hosted at http://www.freetexthost.com to keep from clogging the forums.
This could be a video issue, or a missing texture issue. to which I would remove the Coh.checksum file from your City of Heroes main folder and restart the updater.
No guarantee it will work, but its a start and you always gotta start with the easy stuff first.

I forgot to mention as well a defrag is always handy too if you haven't done it for about 2 weeks to a month.

I'd recommend upgrading Vista to Service Pack 2 since it corrected several issues.

Don't use the setup, but the zip file.
(It's kinda advanced)
Go into your device manager in your control panel accessible through "Administrative tools" then Computer Management
Find Device manager in the left window and click (if classic mode is enabled, if not use the next one)
Click "System and Maintnence" then under Device manager, click "View hardware and Devices" (You MUST have administrative privs on the account your currently logged into to access this)
after the UAC window pops up, click continue, then when the driver window opens, click on "Display Adapters"
select your display (should be the only one unless you have multiple vid cards. However by your DxDiag I am assuming your on a laptop so it should be the only one there)
Right click the display and select "Update driver software..."
Click "Browse my computer for driver software"
Then click "Let me pick from a list of device drivers on my computer"
on the next window, click "Have disk"
Browse to where you unzipped the video drivers.
(thankfully you don't have to wait for me to finish downloading the driver for my own chipset as I just had to regretably wipe my computer back to factory... My windows drivers got corrupted. JOY! I lost all my bookmarks and movies and music and etc. etc. etc.... Thankfully I was able to burn my entire CoX folder to a DVD )
now I unzipped mine to
C:\Users\Stygian Renegade\Downloads\winvista_15124
your's should be similar
if yours was the same as mine, you would browse to the following location in the "Install from disk" dialog,
C:\Users\Stygian Renegade\Downloads\winvista_15124\Graphics
click the igdlh.inf (or whatever INF file is in that folder) and hit open.
click on "OK" on the "Install from disk" dialog
The driver should now show in the list on the "Select driver" screen
Hit Next...
It should start installing the updated driver. It MAY go all QQ on the driver but I highly doubt it. If it does just hit whatever button that will make it continue installing.
Your screen will flash and you will hear the "disconnected hardware" audio and the "connected hardware" audio signifying the driver has indeed updated itself.
Next up is the Success screen! Wewt!
Now its time to reboot and enjoy your updated driver that totally doesn't exist on your Laptop Manufacturers website... seriously, why don't they update them drivers...
Anyway that will help ALOT with about anything graphic-wise.
and Yes, Vista SP2 will help with alot of stability issues as well.

But definately update your video driver as well. This will help alot and allow you have a few more options inside CoX graphics wise.
(like me, bumpmapping. Old drivers=No bumpmapping options(greyed out) updated driver=no bumpmapping, player bumpmapping or player and world bumpmapping )
Good luck buddy!

*starts blasting Nerdcore as soon as all the music from his MP3 player copies over*

...
hmm. well at least you got the drivers updated (I'm assuming) thats a good thing.

Next thing to try is deleting the following files from the piggs folder in city of heroes,
texFxGuiItems.pigg
texGui1.pigg
texGui2.pigg
texPlayersUI.pigg
and restart the launcher and allow it to download these files (116MB or 122,649,954 bytes)
On a fast connection this shouldn't take too long.
Cross yer fingers. If this still doesnt work I would belive it to be a rendering issue and I'm not wholly sure if CoX uses DirectX or OpenGL for rendering

I'm pretty sure you have already tried the usual /reloadgfx and /unloadgfx as well. (and besides those only work when your in-game. Restarting the client has the same effect)

The issue still hasnt been resolved, so I'd like to see if there are any other suggestions for fixing it.