Hello, I am running Windows Vista Home. I have Norton 360. Norton has blocked svchost.exe file path is c:\windows\system32\svchost.exe . I need to unblock this file. I can't find where to go. I went to "security history" it shows the status as blocked but it doesn't have any undo. Please give me the step to unblock this. I can't go on the internet if this is blocked, I cant install drivers to the network, I cant start up WdiServiceHost which is the Diagnostic Service Host.