PowerPoint is part of the "Office" software suite and not a freebie.
There are cracked versions around, but obviously I couldn't tell you how to get those and have to say don't do it.
As a student your daughter can get the software at a vastly reduced price from websites like www.software4students.co.uk
or, if you wanted a free version, you could use www.openoffice.org
which is very similar to Office (Powerpoint/Excel/Publisher etc) and the files can be read by either (usually, although some of the settings have slight incompatibility problems). This might, at least get her on tonight and you can sort out the full Office version if you want to buy it later.