While streaming videos on YouTube and Hulu, I noticed a signifant amount of lag and buffering. In the past I've resolved this issues by updating my Flash player (even though I typically am on the newest version). Today I tried to install a Adobe Flash 11 and I received the error, "Cannot contact reliable source" amongst a few other errors (I cannot recall what they said). I went to the troubleshooting section, uninstalled my current Adobe Flash, and tried to download version 11. I keep getting the aforementioned errror. Now rather than a lag time and buffer issue, I cannot watch any videos at all since my Flash player was uninstalled and I cannot download the new version. I'm currently on a relatively new iMac with OS X version 10.8.4. I don't think there is problem with my actual computer. Can anyone help? 
PS: I have an unhealthy affinity for catching up on terrible TV shows on Sundays so I'm saddened by my inability to watch Hulu Plus. 