Microsoft Security Essentials was already installed when I first got my pc. But yesterday when I turned on my computer then I noticed that MSE disappeared from the quick icon area. So, I went to Add and Remove and uninstalled it and when I tried to install a new copy of MSE then I started getting error message that stated "Cannot complete the Security Essentials Installation" and also error code 0x80070780. I dont know what to do now. Any ideas?
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