Win7 x64: no text on desktop, can't access start menu

Hi, my Win7 machine is acting strangely, here are my symptoms:

personalization missing from login box
desktop icons have no text beneath them, some apps won't start
text in menus has disappeared
dialog boxes have no text
can't access start menu, therefore unable to run cmd as admin

screenshot similar to mine except my start menu doesn't come up

I've run sfc /scannow, it says no problems found.

I do have Vista on a separate partition that I can boot from. Is there something I can do from Vista to repair Win7? Have my personalization settings become corrupt? Thanks very much.

specs:
Windows 7 Ultimate x64 Retail (haven't updated to sp1 yet)
Intel Core i5 2500K @ 3.30GHZ not overclocked
Corsair 8gb ram
Gigabyte GA-Z68X-UD3H-B3 motherboard Rev. B3
Gigabyte R685D5OC-1GD video card
Seasonic M12II Bronze 620W power supply
3 SATA hard drives
Malwarebytes free antivirus
Comodo Firewall