Stupid Aero can't change my taskbar colours!!!

I just got a Viao with Windows 7 Home Premium 64 bit installed on it. All was going well. I have Aero working nicely and changed all my tak bars to a very stylish pink!!! But then suddenly everything changed my screen become distorted and stretched and I eventually resored it by changing the resoluation. I checked the colour which is set to 32 bit true colour and all seemed normal except when i went to change my taskbar back to pink I couldn't do it!!!!!
I still have the aero themes saved on my computer but I just chan't seem to change the colours... it comes up with a old fashioned windows colour and appearence box instead of the previous colour pallete it gave me.
I checked my experience rating and its at 1.0.... I tried ajusting the visual effect so that they prioritise appearence over performance but this had no effect.
My graphics info is:
Name Standard VGA Graphics Adapter
PNP Device ID PCI\VEN_10DE&DEV_0A2B&SUBSYS_9072104D&REV_A2\4&12796CB&0&0008
Adapter Type GeForce GT 330M, (Standard display types) compatible
Adapter Description Standard VGA Graphics Adapter
Adapter RAM 512.00 MB (536,870,912 bytes)
Installed Drivers vga.dll,framebuf.dll,vga256,vga64k
Driver Version 6.1.7600.16385
INF File display.inf (vga section)
Color Planes Not Available
Color Table Entries Not Available
Resolution Not Available
Bits/Pixel Not Available
Memory Address 0xE2000000-0xE2FFFFFF
Memory Address 0xD0000000-0xDFFFFFFF
Memory Address 0xE0000000-0xE1FFFFFF
I/O Port 0x0000D000-0x0000D07F
I/O Port 0x000003B0-0x000003BB
I/O Port 0x000003C0-0x000003DF
Memory Address 0xA0000-0xBFFFF
Driver c:\windows\system32\drivers\vgapnp.sys (6.1.7600.16385, 28.50 KB (29,184 bytes), 14/07/2009 00:38)

PLEASE HELP ME... I must get back to pink!!!!!

ALSO when I used to hover my mouse over the bottom task bar on a open internet page I would get a little window showing me the page in full... now I only get the address text showing... don't know if this is anything to do with it!!!

Yey its pink again!!!! Thank you Mike the restore worked wonderfully... I just had to reboot my internet security that seemed to go down after I did the restore but all is well now!!! Massive pat on the back to you!!!!

Wish it was a glitch!!! It keeps happening about every other day!!! Its seems the graphic card stops working or something ... I have to system restore to get it going.... it also stops playing videos in Media Centre when it happens s well... is there anything i can do or is it a case of taking the laptop back for a refund as I have only ahd it 2 weeks????