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The first thing to try is this: It is a keyboard shortcut to shut down a mac laptop. Press the control key (ctrl) at the bottom and press the eject button at the same time (top button all the way to the right which looks like an arrow pointing up with a line under it). This should bring up a window asking if you want to restart, sleep,cancel or shut down. Click Yes to shutdown! If this does not work, here is the second option. Press the power button down on the upper right side,and just hold it down until the computor turns off. I have done this many times with my own computor when it has crashed with no ill effects, I have heard from Apple that it is not good for your computor and can cause problems, so I would only do this if the keyboard short cut does not work Good luck and if you find this helpful please comment!.
when your computer boots up press F8 after the boot screen, its easy to miss the short period you can press this. This should prompt a screen which allows you to choose how to boot windows. Booting windows normally (without restoring hibernation state) or in your last good configuration that worked (it saves restore points pretty much every day your on it and will revert to that restore point) will be your best bets. Hope this helps, let me know if it gets tricky.
if you hve a new computer that needs to join the existing network, you have to update the new computer with the security key thats on at the currrent router. If you are not sure about the current security key, then the only way to get this computer to the network is to reset the router and bring it back to factory defaults.
yo might not need any sw, lot of nowadays have a partition that has the recovery DATA on the harddrive itself and you can access it by pushing F10 or F11 or else depends on the manufacturer, you will see that option when you restart the pc , and when the window is still black. otherwise, you might need to purchase it from site like http://www.restoredisks.com/ good luck
It's very possible that you got a bad DIMM of RAM if this started right after adding more.
If you have RAM from different manufacturers, even though it might be the right specs, and should work I've seen situations where the 2 DIMMS just don't play nicely together.
You can use a Linux LiveCD to test the RAM for defects. Just boot the LiveCD (holding the Option key after the chimes) and when you get to the grub screen select "memtest86". there are a ton of LiveCD's available. I would suggest Ubuntu.
If it turns out that the RAM is fine the tech will need more info to help although he/she should have asked some probing questions.
Doesn't anyone know how to give specific details about their issue instead of broad generalizations (it crashes) anymore...? :) Just playing...
"When" does it crash? Right after you turn it on? After 3 hours of usage every day (possible overheating)? What apps are you running when it crashes? Tell him "exactly" what it says on the screen when it crashes as it could be a kernel panic or a specific application causing it from the description given
I realize to a non-tech the perception can often be "This didn't start happening until you touched my computer" but realistically adding RAM, unless it's bad, won't cause that behavior as long as it's seated properly and the tech didn't forget to reconnect any fans, etc.
It would not be out of line to ask the shop to double check that the above isn't the case. Unless all of the above had already been double checked and confirmed they can't determine that "nothing's wrong".
I really do hope this helps anyone how has a similar issue and reads this.