Please HELP ME. Trim Enabler Corrupted my OS

Question

Hi All,
yesterday I made a big mistake. Following the Trim enabler developer page, in order to make the program to work, I used terminal in recovery mode to write this command lines:
"Recovering from stop sign on boot screen
For those who are stuck on the grey boot screen, here’s how you get back into OS X:
Step 1: Boot recovery mode by holding Cmd+R during boot
Step 2: Open the Terminal from the menu bar
Step 3: Run this command:
nvram boot-args
Does it say “kext-dev-mode=1″? if so, you can skip to Step 6. If it says “error getting variable”, continue with these steps:
Step 4: Run this command:
nvram boot-args=kext-dev-mode=1
Step 5: Reboot back in to Recovery Mode again
Step 6: Run these commands, replacing Your Disk Name with the name of your Mac disk (partition). You can type ls /Volumes to get a list of volumes. Note the quotes around the disk path and that there should be no / before System.
cd "/Volumes/Your Disk Name"
touch System/Library/Extensions
kextcache -prelinked-kernel System/Library/Caches/com.apple.kext.caches/Startup/kernelcache -K System/Library/Kernels/kernel System/Library/Extensions
Step 6: Wait until it finishes (can take as long as 5-10 minutes, don’t abort it) and reboot.
You should now be back in OS X with Trim enabled."
Unfortunately, after this, ma macbook has become very slow during power on (there's always the progress bar under the apple symbol) and takes 5/8 minutes to shut down.
I've tried to restore to default values using the following lines
"Reversing any changes by Trim Enabler
If for some reason the above steps does not work for you, you can undo all changes made by Trim Enabler by following these steps:
Step 1: Boot recovery mode by holding Cmd+R during boot
Step 2: Open the Terminal from the menu bar
Step 3: Run these commands, replacing Your Disk Name with the name of your Mac disk (partition). Note the quotes around the disk path and that there should be no / before System, except for the first part of the cp command.
nvram -d boot-args
cd "/Volumes/Your Disk name"
rm -rf System/Library/Extensions/IOAHCIFamily.kext
cp -r /System/Library/Extensions/IOAHCIFamily.kext System/Library/Extensions/IOAHCIFamily.kext
chown -R root:wheel System/Library/Extensions
sudo chmod -R 755 System/Library/Extensions
touch System/Library/Extensions
kextcache -prelinked-kernel System/Library/Caches/com.apple.kext.caches/Startup/kernelcache -K System/Library/Kernels/kernel System/Library/Extensions
Step 4: Wait until it finishes (can take as long as 5-10 minutes, don’t abort it) and reboot.
You should now be back in OS X with Trim disabled."
but there's a problem with the command sudo (sudo: command not found) at the line:
sudo chmod -R 755 System/Library/Extensions
Then I've formatted the HD and restored Mavericks using the last backup made before the installation of Yosemite. It seemed to work good but, after having upgraded to Yosemite, i've started experiencing the same troubles once again.
I've also made a reset using cmd+alt+p+r and repaired the disk permissions but nothing has changed.
The system is
Macbook pro late 2010, 8 Gb Ram, HD  250Gb SSD Samsung 840 series
I really thank you in advance for your help
Michele

Answer 1

I've just scanned my logs and I've found a lot of failed connections to teamviewer but I do not have this app installed. Can you suggest me a way to stop these connections? I found tons of messages like this:
21/10/14 14:45:31,851 com.apple.xpc.launchd[1]: (com.teamviewer.service[1428]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer.app/Contents/Resources: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
21/10/14 14:45:31,851 com.apple.xpc.launchd[1]: (com.teamviewer.service) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
21/10/14 14:45:37,239 com.apple.xpc.launchd[1]: (com.teamviewer.teamviewer[1430]) Service could not initialize: Unable to set current working directory. error=2, path=/Applications/TeamViewer.app/Contents/MacOS: 14A389: xpcproxy + 12907 [1227][1016C726-9ACF-3A24-9C51-A279F5C6B167]: 0x2
21/10/14 14:45:37,239 com.apple.xpc.launchd[1]: (com.teamviewer.teamviewer) Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
thx