Problems switching from windows to linux

Hello all,

Recently I have been experiencing painfully slow loading times on my website so I did a bit of research on the forum and noticed that switching from windows hosting to Linux hosting may solve the problem.

I switched the hosting plan last night but now I am just receiving a 500 internal server error ever time I visit the page (www.pgbtechnicalsolutions.com).

My host is GoDaddy by the way..

Any ideas what may be causing this?

Any help is greatly appreciated.

Thanks!