MYSTERY - Why Would Firefox 35 Behave Differently In Vista Than In 7 or 8.1?
If I go to one of my favourite websites ORIGIN PC | Custom Computers | Gaming Desktops and Laptops in FF34 or even in Chrome 39 in Vista the home page has suddenly started garbling with a white background, when it's supposed to be a black background. In Vista/IE9 it behaves almost correctly except for some odd line spaces thrown in, and in the other OS's normally in IE11.
I've tried in Safe Mode (all add-ons disabled) - still the same.
In Windows 7 and 8.1 it behaves normally in all browsers.
So what is different in Vista that could cause this?
I have emailed OriginPC and they don't seem to have any idea why it's happening either.
Anyone any ideas?

If I go to one of my favourite websites ORIGIN PC | Custom Computers | Gaming Desktops and Laptops in FF34 or even in Chrome 39 in Vista the home page has suddenly started garbling with a white background, when it's supposed to be a black background. In Vista/IE9 it behaves almost correctly except for some odd line spaces thrown in, and in the other OS's normally in IE11.
I've tried in Safe Mode (all add-ons disabled) - still the same.
In Windows 7 and 8.1 it behaves normally in all browsers.
So what is different in Vista that could cause this?
I have emailed OriginPC and they don't seem to have any idea why it's happening either.
Anyone any ideas?

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My Computer
System One
-
- Operating System
- Win 10 Pro x64 x 2
- Manufacturer/Model
- Alienware ALX x58
- CPU
- Intel® Core™ i7-975 Extreme O/C to 4.02 GHz, 8MB Cache
- Motherboard
- Asus® P6T Deluxe V2 X58 LGA1366
- Memory
- 24GB Corsair Vengeance DDR3 SDRAM at 1600MHz - 6 x 4096MB
- Graphics card(s)
- 1792 MB NVIDIA® GeForce® GTX 295 Dual Core
- Sound Card
- Onboard Soundmax® High-Definition 7.1 Performance Audio
- Monitor(s) Displays
- Samsung XL2370 HD LED backlit 23" W/S 2ms response time
- Screen Resolution
- 1920 x 1080
- Hard Drives
- 2 x 500gb SATA II 1 x 1TB SATA II 1 external eSATA LaCie 3TB (Non-RAID)
- PSU
- Alienware® 1200 Watt Multi-GPU
- Case
- Unique
- Cooling
- 4 case fans @ CPU water cooling.
- Internet Speed
- 1gb/s up and down