"The magic number in GZip header is not correct. Make sure you are passing in a GZip stream."
when you google for this you will find out it has something to do with coding and since you are the only one with that problem, I would guess something in your system is messed up.
Maybe uninstalling and reinstalling the microsoft visual c++ runtime librarys 2005,2008,2010 might help, but idk. Or just pm cmp