Cannot boot computer out of safeboot after installing OS X Yosemite

Hello,
I installed Yosemite on my macbook pro from early 2011 recently and I've had nothing but major problems. Right now, the major problem is that I cannot boot my computer out of safe mode. When I try to boot it outside of safe mode, it will either freeze on the sign in screen, or it will freeze after signing in. My computer is also paused in the middle of encrypting the hard drive for FileVault, saying to "connect to power to resume encryption." I know that it cannot finish this process unless the computer is not in safeboot mode. It's making my computer run much harder than usual and deplete the battery much quicker.
This is all very problematic for me. I'm a college student and my life pretty much relies on the usage of my computer.
Some other problems I've had since upgrading to Yosemite:
Speakers stopped working and didn't register (they work now)
Computer is extremely laggy in loading many things
I'm unable to search for any files through finder
There is nothing under "all my files" in finder.

Update:
I was able to get into my computer out of safeboot mode and heres what happened
The encryption start and then paused permanently for several hours. I restart the computer, went into Terminal and typed in "sudo fd setup disable" as suggested by someone in a different thread. The encryption finished, I restarted my computer, and turned FileVault off. So far, things seem to be working much, much better. I guess time will tell if this is a permanent fix.

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Has anyone's screen go blank and not boot up after installing the new yosemite OS

has anyone's screen go blank and not boot up after installing the new yosemite OS

Hi Mofimac,
Thanks for visiting Apple Support Communities.
If your Mac is only starting up to a blank gray or white screen after updating OS X, you can find some useful troubleshooting steps in this article:
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I recommend going through these first three sections first:
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It's beta open source software so I'm not surprised. It does't look to be too active a project, so I don't know if it will help or not but you might be maybe better off posting a bug report on their Sourceforge page here: http://sourceforge.net/projects/kompozer/

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Cannot boot computer out of safeboot after installing OS X Yosemite

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