Means your company computer and network is compromised. Either
1) Company restrict the use of company computer's to limit the use for work only.
2) Company has set a high level of safety net by setting untrusted website to a grey list. It means that you company doesn't like people to surf website which are outside of whitelist. When you click on the website, your company computer will log the website which you visited.
also possible that your company comp did kena virus. do a scan or send to IT department?