I have a strange problem as follow:
when I open any site using any browser, it opens and everything goes well but when I try to sign in with Yahoo or Hotmail to check emails (using any browser) it refuse and it gives me this page "Forbbiden" or "You are not authorized to open this page" . This problem happens wth all accounts not mine only.
Please help me to solve this problem.
Note: this happen only in my PC at work, but in using other PC(s) everything go well