And if it is a work laptop you will need to consider if it is a member of a domain and if it has been statically assigned a single DNS server address that points to your Domain DNS server at work.
Copy and paste this
209.85.145.105
into the address (URL) bar (not the search bar) of your preferred browser and hit enter. If Google comes up then you know it's a DNS issue if not then helpifIcan may be on the right track with a proxy server address being present and not required when you are at home.
Regards
Randy