There is something wrong with my system's default font. My whole system looks normal, and even the registry I looked up looks normal too. But when it comes to browse some websites (I'm using Firefox 4RC). Everything's bold! 
I tried IE9, it's also bold, same as Firefox. But the others like Opera and Google Chrome, they look weird, they set it like Times New Roman and some others. :shock:
I tried to reinstall all my internet browsers, still have the problems.
And I even downloaded the registry file VistaFontFix, still have the problems.
Your website also set in bold too. Could you help me how to fix these problems?

I tried IE9, it's also bold, same as Firefox. But the others like Opera and Google Chrome, they look weird, they set it like Times New Roman and some others. :shock:
I tried to reinstall all my internet browsers, still have the problems.
And I even downloaded the registry file VistaFontFix, still have the problems.
Your website also set in bold too. Could you help me how to fix these problems?
My Computer
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- ECS/GeForce 8000 Series
- OS
- Windows 7 Ultimate SP1 86x
- CPU
- AMD Athlon(tm) 64 X2 Dual Core Processor 5000+, 2600 MHz
- Motherboard
- EliteGroup: GF8200A Black Edition
- Memory
- 4 GB (3.00 Usable)
- Graphics Card(s)
- Nvidia - GeForce: 440GT 1GB GDDR5
- Sound Card
- IDT High-Definition Audio CODEC
- Monitor(s) Displays
- AOC M19W531
- Screen Resolution
- 1440x900 60Hz
- PSU
- HEC - Raptor R400
- Case
- Standard PC Case
- Cooling
- 20% More PC Cooling
- Keyboard
- CD-R KING DA Series
- Mouse
- Logitech Mouse
- Internet Speed
- 150 kbp/s
- Antivirus
- avast! Antivirus
- Other Info
- My PC needs to be about 20% Cooler.