Hey everyone! I’m very new to Unity, just been introduced into it through University. Have taken a real liking to it and have been playing around with it in the labs. I decided to install it on my PC at home to continue with some of the work assigned however I seem to be running into a weird issue when editing the terrain. I have put up a picture of the problem here:
My computer spec is as follows:
Windows 7 Ultimate 64bit. w/ Service Pack 1.
Intel Core i3 running at 3.10GHz
8Gb of RAM
Nvidia GeForce 560ti
If you need anything else, just ask.
Things I have tried:
Reinstalling Unity.
Re-Downloading Unity, Uninstall Unity, Physically delete folder from Hard Disk and then Reinstall.
Install all remaining windows updates.
Updating Graphic Card Driver to latest.
Installed the hot-fix it requires.
Searched the forums and Google results endlessly for similar problems.
Installed Unity on laptop (Also running Win7 64bit, it did the same thing)
Has anybody run into this problem before? If so, how did you solve it? Iv been trying to find out how to fix this for weeks and finally decided to come here and beg for some help, so any help at all will be greatly appreciated. I thought I could get on with the work and ignore it, but its just ugly to look at or am I just being too picky? 
Anyway, thank you in advance.