Yosemite - multiple errors - found FileVault error - Solution found

Question

My early 2013 13" MBP Retina with a 700GB SSD suddenly started having multiple minor errors immediately after upgrading to OS X Yosemite 10.10.1, and accepting default FileVault encryption for hard drive. 700GB drive has 600GB of data o it with 100GB free.
1) Mail started freezing and hat to be Force Quit.
2) Mail would show no internet connection and would re-enage after being Force Quit.
3) Iphone 5 would not connect or sync
4) All photos remaining on iphone 5 were scattered and disorganized throughout multiple files
5) Screensaver continuously reverted to National Geographic. Had to be reset every day to Aperture photo file.
6) Internet wiFi connection dropped off continuously every 5 minutes for no apparent reason.
7) Machine "crashed' on a daily basis for no apparent reason
I checked the forums and completed the following actions:
a) completed disk utility verifying and repairing permissions and disks - no fix (errors found requiring restart command R and unlock disk with "File" at top of page.
b) completed PRAM reset with restart command, option, PR - no fix
c) completed SMC reset , shift control, option power - nil fix
d) completed memory test with restart command D (short 5 mins) (long 40 mins) memory ok - nil fix
e) completed re-install off of the internet with restart command R 9 (four hours) - nil fix
f) checked System Preferences, Security and Privacy, FileVault and found it stuck at encryption at 20% of bar with a message to connect AC power.
    Ac power was already connected. Changed power supply - no change. Forums said PRAM reset with immediate Command R, unlock drive with upper tool bar
    "File" and "Unlock" command. Restart. FileVault encryption resumed showing 30 hours remaining. Froze again after 5 minutes. Repeated steps in f); FileVault
    resumed. Ran for one hour, then stopped again. Repeated steps in f); File Vault resumed and ran for 12 hours; with time estimates changing from 3 days to 10
     minutes and back to 3 days and back to 2 hours; until File Vault showed "encryption complete". As a precaution, completed PRAM reset, Command R disk utility,
     unlock HD, verify permissions, verify disk, restart; "Turn Off FileVault". Four hours to decrypt computer. Restart, reset PRAM, reset SMC.
Requesting a proper knowledge base fix?
Results to follow.
My time is valuable.
Thank you for burning up 3 days of my life.
I hope this post saves someone else a lot of time, stress, and effort.
Best regards,

Answer 1

You must start by posting in the appropriate Windows 7 found @
http://social.technet.microsoft.com/Forums/windows/en-US/home?category=w7itpro
This is a Windows Vista for discussions about Windows Vista, not Windows 7.
Windows 7 discussions are found @
http://social.technet.microsoft.com/Forums/windows/en-US/home?category=w7itpro
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