Hmm, it's been awhile but there is a combination of keys to push as you start up windows, the keys vary depending on your motherboard. They can be found in either your motherboard paperwork or OEM paperwork if you brought your system whole i.e. through dell or harvey norman etc. Otherwise it should tell you as your loading up windows, watch carefully for what keys to push to enter bios. If you see the instructions but miss pushing the keys, no problem, just remember it and restart your computer again and then press the keys at the appropriate time. If in any doubt just keep pressing the keys throughout the entire load up process.
Once in bios go to the boot up sequence choice - it will say something similar and can't be missed if you search all the options, and choose the sata drive as option 1.
Alternatively you could just disconnect your ide hardrive until you are sure that this is the problem. If you disconnect and it still doesn't work, then no point entering bios at the present. Of course if you do have to change your boot order you will have to remember you have done it because you may need to boot from CD at a later stage. (Most people leave CD as boot option 1, followed by main drive.)
When you exit bios you will have to save.