Lion won't start stuck in loop?

Lion won't start, stuck in loop

This morning my Dual-Core Intel Xeon, Mac begins start up, then turns completely off. My (own) memory is faulty, but I think I've upgraded to 10.7.5.
At first it was stuck in start up so I turned it off then on again.
My first warning was when I came into the office this morning and the APC was beeping. Why? That's a mystery too, because its battery appears to be fine, and turning it off then on again the "green" operating light shines as normal. Funny though, when I turned the APC off then on, the computer tried to start up, but I'd shut it down the night before, ...unless, and here's again a memory glitch, ...I may have let it "sleep" overnight, though that would be highly unusual for me.
Hints?

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Have you performed the usual trouble-shooting routines (trashing prefs by keeping command-alt-shift pressed while starting Photoshop, 3rd party plug-ins deactivation, system maintenance, font validation, etc.)?

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Your problem may be different, so it might serve you better to start your own thread. That said, both problems occurred when switching locations, so I wonder if the network/wifi might be involved. However, Niels, if you are unable to start at all, with any of those methods, there may be something more serious involved (we have had no feedback from the OP in the last few hours).
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Interesting article, but I knew I was leaving PowerPC apps behind when I moved to OS 10.7, and Adobe claims that After Effects CS 5.5 is fully compatible with Lion. But you must be right about prefs; there's gotta be something causing the Mac OS to think this version of CS is ancient...
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Thanks Eric.
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I also posted this in the MBP forum....
I use my computer every day for work, it's a MPB 2.16 intel core duo
2 gigs of ram running the very latest os-x available.
alot of the sites I use for work only work on Internet explorer 6 or better, so I downloaded an application called ies4osx which uses an X11 script to run a windows version of internet explorer. worked perfectly at first, but as the day went on my computer started getting very slow. I'd quit, still slow, and after a restart it would pick up again. So after a few times restarting (normally, not forced), I started it up, and it went to the desktop background picture (no menus icons etc), and the mouse is there, and switches between the mouse, and the spinning wheel. The mouse will move, but that is the only response the computer will give.
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I would archive and install, but it requires 11 gigs and i only have 6 free.
I really need all the info on here for work, and i need the computer itself. I'm using an iBook G4 i had around the house now.
does anyone have any ideas? I have both computers here at work with me all day. Will target disk mode work between the G4 and the intel? Any ideas are more than welcome

Hello again:
I think you perhaps missed something. This is a description about what an archive and install does:
http://support.apple.com/kb/HT1710
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I use my computer every day for work, it's a MPB 2.16 intel core duo
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OK now i'm frustrated beyond all belief, i'm about to go throw this MBP at someone at the apple store
I cleared room (about 18gigs in total) and did an archive and install.
So now I have all my files/preferences in a "Previous Systems" folder.
So my mac looks like a new mac, minus the ~45 gig folder, doing nothing, and i'm down to 4 free gigs (18 before i archived/installed)
So now that I've archived and installed, how do i get my programs, preferences etc back to where they were? I can't just drag and drop because it wants to copy everything instead of move it.
I'm beyond frustrated at this point. and i don't think my boss is too happy that all i've been doing all day is screwing around with this pos computer.(which wasn't priced as a pos!!)

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Lion won't start stuck in loop?

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