Hello Joshi,
Thank you for your message.
CS-Cart supports IE of version 7 and later. However, please note that IE7 is not fully compatible with CS-Cart concerning the pages layout. So there could be some minor issues with some page elements layout because IE7 has a lot of bugs related to the CSS properties which are used in CS-Cart.
Thank you.
—
Pavel Zyukin
CS-Cart Support team