Harddrive Format Error and Theme Custom Problems

Hi, I 'm a new Win7 comer, I got 2 problems which I really can't solve....
To be clear, I had uploaded lots of pics for explain
(I got Windows 7 ultimate 64 bit)

First Problem :
I got a 3TB HD for my system. I cut my HD 300GB for OS, others for storage.
But somehow it seems I can only use up to 1.7TB



It seems like those 746.52GB are totally wasted (I can't even format to use them)
I tried to delete drive E, but those 2 volume won't merge...
Windows 7 can't support 3TB HD ???

Second Problem : Back then in WinXP I always changed the background to light grey
Pure white is hurting my eyes.



So once I finished install Wins7, I changed the background color as usual :



But this time I only changed that small window's color :



And it helps nothing...



Kinda funny it works perfectly on window classic theme :



Please don't tell me I have to keep in window classic theme
my pc looks even older than winXP

Really need help on those 2 problems
Thanks for everyone 's time !

Welcome to the forum,

In regards to your first problem, drives over 2TB have to be formatted GPT to use all of it.

Windows support for hard disks that are larger than 2 TB

Since that is your boot drive you would have to have an UEFI BIOS to change that to GPT.

Convert MBR Disk to GPT Disk

wow, I just went out brought a pizza and my first problem was already solved
Thanks a lot of your quick reply

Really appreciate it !

Hope my second problem can be solved too
otherwise I need to keep it in classic mode T_T

You're welcome, Those options you are changing are for the Basic or Classic themes, if you want a different color in those ares on Aero themes you probably need a custom theme.

I see, now I'm trying to find a custom theme which match my requirement
The windows 7 Luna theme just caught my eyes.
I hope it helps

You will need to use one of these methods to enable custom themes,

Enabling Custom Themes - Windows 7

Theme - How to Apply Custom Themes

Thank you so much for your kind reply ! derekimo !!!
Now all my problems solved !

Really really appreciate your help \(^_^)/

You're welcome. :)