downgrade del bios, è possibile?

[omnikohh]

salve raga, ho unHP Pavilion tx1020ea Notebook PC


Microprocessor AMD Turion™ 64 X2 Mobile Technology TL-50
Microprocessor Cache 2 X 256 KB Level 2 cache
Memory 1024 MB (2 x 512 MB)
Memory Max up to 2 GB
Video Graphics NVIDIA® GeForce™ Go 6150
Video Memory up to 128 MB (shared)
Hard Drive 120 GB 5400 rpm
Multimedia Drive Lightscribe Super Multi DVD Writer (+/-R +/-RW) with Double Layer support
Display 12.1” WXGA High-Definition HP BrightView Widescreen Display with Integrated Touch-screen (Pen input optimized)
Fax/Modem High speed 56K modem
Network Card Ethernet 10/100BT integrated network interface
Wireless Connectivity Bluetooth® wireless networking
Multimedia Features HP Pavilion WebCam with Integrated Microphone (Nordic and Middle East versions only)
Sound Altec Lansing® speakers

3D Sound Blaster Pro compatible sound 16 bit integrated
Keyboard 101 key compatible keyboard
Pointing Device Touch Pad with On/Off button and dedicated vertical Scroll Up/Down pad, volume control, mute buttons, 2 Quick Launch Buttons
PC Card Slots
One ExpressCard/34 slot
External Ports
5-in-1 integrated Digital Media Reader for Secure Digital cards, MultiMedia cards, Memory Stick, Memory Stick Pro, or xD Picture cards
1 VGA port
3 USB 2.0 ports
1 RJ 11 modem connector
1 RJ 45 Ethernet connector
S-video TV out
Remote control infrared port (Remote Control optional)
2 Headphones-out one w/ SPDIF Digital Audio, 1 Microphone-in port
Cable docking connector
Power
65 W AC Power Adapter
4-cell and 6-cell Lithium-Ion (Li-Ion) battery
What's In The Box HP Mini Remote Control

posso fare il downgrade del bios?se si, come?tnx