How to Activate windows server 2008?

I got “Vista7 Slic LDR” – it said it will work on windows server 2008 but when I load it, the “install” button is always disabled, even after uninstalling the current license and rebooting.
Can anyone help me here please?
Answer #1
If you know anyone in school with an @school.edu address;
You can get a legit key from Microsoft at DreamSpark:
https://www.dreamspark.com/
Answer #2
SmAsHeDr replied: If you know anyone in school with an @school.edu address;
You can get a legit key from Microsoft at DreamSpark:
https://www.dreamspark.com/
Unfortunately, I don’t
Answer #3
Just use the Windows Loader. If you can’t use that then you got a dodgy Windows 2008 R2 release. Get a better one and reinstall.
Answer #4
Which loader should I use? There are so many of them.
Answer #5
Windows Loader by DAZ?