Have to say, I would agree with Pete's suggestion of using CCleaner and Malwarebytes.
As suggested last time around, I would also manually restart your router to see if that helps. Just turn it off for a minute and then back on. Refreshing your IP address might just help.
From the ITV Player site:
12. I live inside the UK but it says that I am blocked because I am not in the UK, why?
We do not hold international rights to all of our programming so video content is supplied only to users with IP addresses in the UK. Some users in the UK may be affected by such geographic blocking if their internet service provider (ISP) uses servers outside the UK.
If you are within the UK, please contact your ISP to find out why you are being affected by geo-blocking. AOL customers may experience issues if using an AOL browser. We suggest using another browser such as Internet Explorer or Firefox.
In addition, programs such as web accelerators can divert your internet connection outside of the UK and cause the same problem."