Unable to load themes due to php.ini using Webmatrix

Hi
I’m using WordPress locally on Webmatrix 3. When I try to install a new theme, I get the following:
The uploaded file exceeds the upload_max_filesize directive in php.ini.
In ‘Add Media’ it says my upload limit is 2mb, I have tried all the solutions I have found in the forum to no avail. I found my php.ini files on my C drive and altered them but it made no difference. When I look at the php.ini code in Webmatrix I see the following and can’t make out what to change:

/**
 * Determines the maximum upload size allowed in php.ini.
 *
 * @since 2.5.0
 *
 * @return int Allowed upload size.
 */
function wp_max_upload_size() {
	$u_bytes = wp_convert_hr_to_bytes( ini_get( 'upload_max_filesize' ) );
	$p_bytes = wp_convert_hr_to_bytes( ini_get( 'post_max_size' ) );

	/**
	 * Filter the maximum upload size allowed in php.ini.
	 *
	 * @since 2.5.0
	 *
	 * @param int $size    Max upload size limit in bytes.
	 * @param int $u_bytes Maximum upload filesize in bytes.
	 * @param int $p_bytes Maximum size of POST data in bytes.
	 */
	return apply_filters( 'upload_size_limit', min( $u_bytes, $p_bytes ), $u_bytes, $p_bytes );

Any help gratefully appreciated!