WordPress plugin installation error

I have installed WordPress 3.8 and now I am trying to install WooCommerce - excelling eCommerce 2.0.20 plugin but every time I am getting this error:

**Note: I am trying to install plugin in local machine.**

Fatal error: Maximum execution time of 60 seconds exceeded in M:\XAMPP\htdocs\woocommerce\wp-includes\class-http.php on line 1327

I have tried with bellow code:

1. php.ini (in wp-admin folder)

memory_limit = 32M
upload_max_filesize = 100M
upload_max_filesize = 100M
post_max_size = 32M
file_uploads = On

2. wp-config.php

set_time_limit(60);

but still I am facing this error. I know this very common issue but I need your help to solve this issue.

I will appreciate If you help me ??

Thanks