Hi All - new to the forum, but have been reading for some time now. Appreciate all of the great advice and knowledge shared here. I am wondering if I should try a reinstall of Mavericks due to some issues I've observed over the past few months. I am not noticing any major performance issues, rather just some annoyances that I can't seem to troubleshoot to resolve. I am concerned about upgrading to Yosemite in the fall and carrying these same issues over. I'd rather go into the upgrade with no problems. 1) Since March, it takes 1-2 min to shutdown, and when I logon again I see a shutdown stall report in console. Its a gamed.launched and backups-helper,gamed.launched type of message. Then last week in addition to one of those I got a games.launched.mDNSResponder shutdown stall message for the first time. I get at least 1 of these messages every time I shutdown. 2) If I don't close the lid to sleep, I notice it either doesn't sleep on its own, or takes a really long time to go into that mode. This started about a month ago. I've checked my settings and its set to sleep at 10 min. Typically I will close my lid to sleep, but sometimes I walk away in the middle of something to tend to something, without closing the lid, and when I come back 20-25 min later its still not in sleep mode. I've done SMC and PRAM, doesn't solve anything. Also booted into safe mode, and I cannot tell a difference in that mode. So, should I try a reinstall? Its a mid 2012 MBA, 8GB, 512. original OS was ML. If I do a reinstall, should I do a clean install, or the other where I don't lose anything?