Step 1 - Open My Computers click on Organise then click on Folder and search options.
Step 2 - A new window will open named as Folder Options in which click on view tab.
Step 3 - Scroll down and unchek Show Drive letters.
Here is the preview. You can apply same trick for windows xp too..
That's all Friends if you have any problem or doubt regarding to this post then please comment or mail me.