Exactly what did you do???i formatted my windows partition and installed puppy on my hard drive
Specific details!!
Do you want Windows to still be on the computer?
To answer this need specifics of above question.I can't access my bios menu any more.my pc just goes blank for about 10 seconds then boots into xenialpup.
My guess is, you formatted, thus deleting Windows, and it's boot loader is hanging up, with nothing to boot, and finally goes to booting Xenialpup.
The bios menu is not a menu you see on boot.
A boot loader menu is what is shown on boot up.
Bios setup menu is accessed by pressing a specific key just as the computer boots. Delete, F2, F10, etc.......
That bios setup is used to setup the hardware settings of the computer basic operation.
This is not a Xenialpup caused problem.
Strongly suggest you make a topic about your problem in Beginners Help section of forum.
This way, more people see it and can get better help.