Reversing a Bios upgrade

[Leverndale]

I have a windows & installation with a P7P55D Deluxe motherboard, I want to change my Bios back to its original version, but the update utility that came on the CD will not allow this, neither will the EZ flash 2 and I cannot get into Dos only windows dos which cannot open a 64 bit file, I was also trying to use the Asus AFUDOS V2.36 ES utility which is a dos file.
Am I scuppered ?
Thanks in advance.

 

[Geek.]

i don't know if this will help! http://vip.asus.com/forum/view.aspx...el=P5K+Premium/WiFi-AP&page=1&SLanguage=en-us

 

[Leverndale]

Thanks Geek, had a look at that already, maybe it's just me (probably) but I cant get the file to open. I think it needs DOS.