What causes the screen to freeze? 10.7.4

update to 10.7.4 and now for no reason the screen just freeze's

Use backups with Carbon Copy Cloner in addition to TimeMachine.
You can find CCC on www.macupdate.com
Lion does not include support for Rosetta. That and plug-ins and extensions change.
You really should try the Safari support forum www.apple.com/support/safari to help you isolate why or maybe you just need to
1. delete all the history cache and other temp files is saves to disk ~/Library/Caches/ (MetaData, Safari, com.safari etc)
2. Create a new Safari profile folder ~/Library/Safari
Or create a new user account for your system also and try that.
Never upgrade one OS over an older one, install on a new hard drive. Then use Setup Assistant.
And you might want to just try installing Lion new on another hard drive and see how Lion only really runs.
If you had saved the Lion installer you could test it out on another hard drive.
You can always boot from the 10.6.x DVD or flash memory that you had and wipe out Lion and take an hour to install SL to a new drive and do all the updates and also use Setup Assistant from your old drive.

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I've (finally) received my ZEN Touch 2 with GPS two days ago, and it truly is a fantastic MP3 Player. But guess what? Today, for the first time, it really did froze, using the N64oid emulator. When the ZEN is lagging, I'm simply waiting, and it work like a charm a few seconds later. But now, it was completely frozen. Touch Screen, Power button... Tried connecting to computer, no reaction.
So in a bad mood, I tried reseting the unit, which I'm obviously not suposed to do often, I had a hard time. First, the reset hole is way too tiny!? Even with a paper clip or a pencil mine, this is ridiculously hard!? First, I even used the wrong hole, I though this was the reset hole, so yeah, the paper clip got inside the ZEN... Truly awesome. After all, I managed to remove it.
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I still have a one year warrantee, but undestand me, I?absolutely wouldn't want to ship it to Creative?in?the US, then get it shipped back to Plattsburgh, and then to my home. That'll cost me hell (Again)!
Alright,?I'll?now like to know what cause the ZEN Touch 2 to freeze? In my case, that was the emulator that was too advanced for the ZEN (And since it doesn't support multi-touch, it's hardly playable without a USB keyboard or gamepad (Possible?), or Wiimote). ?I don't have applications running?in the backgroung, only one at a time.
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)?Thanks for the reply.
I unistalled many 3rd Party APPs (Only /3 were booting, anyways), and I can already see a huge difference with the fluidity of the menu. It's also turning on faster.
I already uninstalled N64oid, but kept the others 2D emulators, never had a problem with them, they run without lagging.
What's odd, however, I downloaded Firefox from ZiiO Space, ran it, and the ZEN went pretty much crazy; black screen, I tried to get back to the menu, pressing buttons and all that, and then the ZEN vibrated like hell, perhaps because I pressed the buttons a lot of time. I finally made it, without resetting, but that was freaking scary. Oo
Uninstalled Firefox. I find it strange that I downloaded it from ZiiO Space, and that it doesn't work like normal.
I'll try to be more careful while downloading APPs, if I can.
I appreciate the reply.
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What causes the screen to freeze? 10.7.4

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