Theme breaks after activation.

I have installed v 4.1 locally to do testing on my website and experiment w other themes.

However I know installing wordpress locally can make you have to mess with php.ini settings to get the theme to upload. Max execution time and max upload size and all of that has been changed to numbers above what I need.

But my problem is, I install a theme and it installs fine and I go to activate it, then boom nothing. The page turns white. You cant use the front end or backend. So I have to go to the file system and delete the theme i just uploaded so i can try to fix it and return it to normal. A few themes appear to work. Themes that are lighter and not as bloated. So i am thinking it has something to do with config settings or php settings or apache settings etc.

Also I click view source on the blank pages that show up and they have nothing there, but the link is there, ie, it goes to theme options after install.

It seems like something is keeping the pages from loading. Any help is appreciated . Thanks.