I got problem with win 64 bit that came with VAIO E Sries VPCEA42EH, the 64 bit os can not run my company software ,so I changed my win 7 os to 32 bit version.
Which driver of VAIO can I use for this change?
you cannot change drivers to downgrade from 64bit to 32bit OS. you need to re-format the drive and install windows 32it with 32-bit key code. then you need to install all the drivers. download them from sony website.
first make sure to create recovery discs of your original OS.
you can also try running virtual xp mode (i think it's 32bit) if computer has windows 7 professional. get the virtual xp mode files from microsoft website (free download)
run virtual window with vmware and install another 32bit windows .