i've just noticed my startup has become about 20 seconds longer than usual and there is now a spinning circle that appears when the apple logo appears on-screen. i've looked it up on google and this came up: "When loading the kernel environment, BootX first attempts to load a previously cached set of device drivers. If this cache is missing or corrupt, BootX searches /System/Library/Extensions for drivers and other kernel extensions whose OSBundleRequired property is set to the appropriate value for the type of boot. (This is either a local or network boot, depending on the current selection in Startup Disk preferences.) You can recognize this stage by the metallic Apple logo and the spinning gear that appear on the screen." because this mentions networks, i'm worried it might have something to do with parallels which i had uninstalled previously, or so i'd thought. when a couple of networks related to parallels reappeared once i deleted them. i deleted them again but decided to look it up on google and found this page: http://kb.parallels.com/en/5714 i ran the terminal command on this page and did the subsequent permissions repairs but reboot has been slow ever since. to make things worse, and this is why i think boot up is slower now, is because i didn't uninstall parallels at first after all. not sure what that terminal command did or if it had anything to do with it but i thought it would be worth mentioning. sorry this is such a long post and also sorry for being so stupid and messing with terminal when i really don't know what i'm doing! hope someone can help, thanks.