If a Bitdefender.co.uk coupon code isn't working, consider the following steps:
- Check the expiration date: Ensure the coupon code hasn't expired.
 - Verify the code: Double-check for any typos or errors in the code.
 - Read the terms and conditions: Some codes may have specific requirements or restrictions.
 - Clear browser cookies: Sometimes, clearing cookies can resolve issues with applying codes.
 - Try a different code: If one code doesn't work, there might be other valid codes available.
 - Contact customer support: Reach out to Bitdefender's customer service for assistance.
 
If none of these steps resolve the issue, it might be best to look for alternative discounts or promotions.