i have installed the windows 7 RC onto my home computer and most of it seems to be working fine but i am having trouble opening up windows explorer items usch as my computer, control panel and other such folders. even when i downloaded updates i couldnt open them. i also keep getting a message saying "Windows cannot access the specified device, path, or file. you may not have the appropriate permissions to access the item." (note i have only created one account and have kept it as admin)