Reinstall Vista from XP downgrade

When I bought my Inspiron 1545 in 2010 it was running Vista, in 2012 I was having that much trouble with the speed I obtained a legal copy (I think) of XP and installed that on it.  Now XP is no longer supported I want to put Vista back on but the recovery CD that I made doesn't appear to work it asks for winload.exe

The recovery discs were made from the laptop as I wasn't supplied the Vista OS discs at the time.

I don't think the system would be able to handle Win 7 or 8, hence why I'm trying to get back to Vista.

Thanks in advanced for your help.

Graham