My MacBook Pro (10.7.3) gets stuck in grey screen after restart. To get it to boot, at the very least, I have to run disk utitlities and repair permissions. Today I had to restore from time machine to get it past the grey screen. I'm afraid to restart the machine now and I won't unless I really have to. Normally I'd just take my sick mac to the Apple store but the country I'm in doesn't have an Apple store. I need to make it through this month before I return to the US. Would putting on a fresh version of Lion help things at all? What other troubleshooting steps should I consider, if any?