After installing new antivirus program on Windows Home Premium 7. I cannot log on as administrator, open itunes, log onto icloud,etc. on my laptop.

Hello, Can you provide some screen shot or an error so that we can help you?

Sorry, but you have posted your question in a forum that talk about Microsoft Operations Framework (MOF), then I am moving your post to another forum and I hope you can get some help. But if you want you can try to find other forum by yourself: http://social.technet.microsoft.com/Forums/en-US/ Hope that helps Regards, Cleber Marques Microsoft MVP & MCT | Charter Member: SCVMM & MDOP MOF Brazil Project: Simplifying IT Service Management My Blog | MOF.com.br | CleberMarques.com | CanalSystemCenter.com.br