Step 1. Connect to your account by using the cPanels file manager or FTP.
Step 2. Navigate to your domains public_html/ or navigate to the root of the account where is the Magento Installed.
Step 3. Locate your .htaccess file of the Magento it should be on the root of the Magento installation.
Step 4. Download the file and open it in the editor of your choice.
Step 5. Just add the code below:
php_flag apc.cache_by_default Off
Step 6. Save and upload the file on the same location and refreh the Magento cache.
You have done, now your APC Cache has been disabled.
Want to know How to Speeding up your Magento Store By Using the APC Cache?
Hope it helps, Enjoy the reading.