Hi and thanks in advance for any assistance reply, (I'm sorry for any mistakes in my writing, English is my second language) I'm running Windows 7 Enterprise. Just a while ago I was downloading a .exe file. When I ran it, nothing happened and it suddenly disappeared from my desktop. After assuming it was a virus, I ran Windos Security Essentials and began a quick scan. Just in the middle of the scan, Windows security essentials shuted down, and the flag of messages in my task bar appeared, saying that Windows Security Center was turned off. I tried to turn it on, but a message saying "The Windows Security Center service can't be started" appeared. I restarted my computer but everything was the same, no WSE and no Windows Defender. I also tried to do a restore, but the restore service was also disabled. Also every ten minutes an Internet Explorer pop-up appears (even when my default browser is Google Chrome). This is my HiJack This Log Thank You for you time.