I did the upgrade, have a look on this, it works pefectly :
As http://communities.intel.com/message/71345#71345 didn't work I found a better way update to the new firmware from a USB-drive:
Before we start you'll have to Open "My Computer". Either from Start Menu or by hitting the Windows Button + E. Now in the new window, press ALT button. Select Tools, then Folder Options. Under View select "Show hidden files, folders, and drives". Also uncheck "Hide protected operating files". Select "Ok".
A) Download the latest firmware, as we speak it's 02HD. http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=18363
B) Now you need a program like PowerISO or UltraISO to extract the content from the ISO file to a temporary folder of your choice.
C) One of the extracted files is config.sys. Open the file with notepad and make sure to remove the two "A:\". The file should look like like this afterwards:DEVICE=HIMEM.EXELASTDRIVE=ZBUFFERS=20FILES=40DOS=HIGH,UMBDOSDATA=UMBSHELLHIGH=command.com /P
D) Now navigate to http://www.vistax64.com/tutorials/191416-dos-usb-boot-drive.html and download the two zip files, win98boot.zip and HPUSBformattool.zip.
E) Unzip the win98boot.zip to a temporary folder of your choice.
F) Insert you USB-drive.
G) Extract the HPUSBFW.EXE from the downloaded HPUSBformattool.zip, and run the program.
H) Make sure the tool has selected the correct device. Pick FAT32. Check quick format. Check create a DOS startup disk and browse to the folder with the unzipped win98boot.zip files. Click start, yes and ok. Close the tool.
I) Now navigate to the extracted ISO files (the files we extracted in 2.) and copy them all EXCEPT command.com and paste them to the drive you just prepared with the HP tool.
J) Restart and enter BIOS to select your USB-drive as your primary boot device. Save and exit.
K) Now it should boot from your USB-drive and auto start the update proces.
Hope you can do it as I did !