Yosemite Slowing Down my Mac Book Air

Since installing Yosemite, My Mac Book Air 1.8 GHz Intel Core i7 4 GB 1333 MHz DDR3 has slowed down and even stopped loading pages in Safari. It seems most of my movies and tv shows are no longer showing in I tunes
Help!!!

Thank you, I copied and pasted the report, but i do not know what any of it means . . .
Problem description:
Since installing Yosemite, My Mac Book Air 1.8 GHz Intel Core i7 4 GB 1333 MHz DDR3 has slowed down and even stopped loading pages in Safari. It seems most of my movies and tv shows are no longer showing in I tunes
EtreCheck version: 2.0.6 (91)
Report generated October 27, 2014 at 4:54:51 PM EDT
Hardware Information: ℹ️
MacBook Air (13-inch, Mid 2011) (Verified)
MacBook Air - model: MacBookAir4,2
1 1.8 GHz Intel Core i7 CPU: 2-core
4 GB RAM Not upgradeable
BANK 0/DIMM0
2 GB DDR3 1333 MHz ok
BANK 1/DIMM0
2 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en0: 802.11 a/b/g/n
Video Information: ℹ️
Intel HD Graphics 3000 - VRAM: 384 MB
Color LCD 1440 x 900
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 0:15:56
Disk Information: ℹ️
APPLE SSD SM256C disk0 : (251 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Macintosh HD (disk1) / [Startup]: 249.77 GB (20.55 GB free)
Encrypted AES-XTS UnlockedPaused
Core Storage: disk0s2 250.14 GB Online
USB Information: ℹ️
Apple Inc. FaceTime Camera (Built-in)
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Internal Memory Card Reader
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
Mac App Store and identified developers
Launch Agents: ℹ️
[loaded] com.google.keystone.agent.plist Support
[loaded] com.oracle.java.Java-Updater.plist Support
[running] com.wyse.MacCompanion.plist Support
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist Support
[loaded] com.google.keystone.daemon.plist Support
[loaded] com.oracle.java.Helper-Tool.plist Support
[loaded] com.oracle.java.JavaUpdateHelper.plist Support
[invalid?] com.wyse.PocketCloud.plist Support
User Launch Agents: ℹ️
[loaded] com.adobe.ARM.[...].plist Support
[loaded] com.spotify.webhelper.plist Support
User Login Items: ℹ️
iTunesHelper ApplicationHidden (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
ScanSnap Manager ApplicationHidden (/Applications/ScanSnap/ScanSnap Manager.app)
Spotify UNKNOWNHidden (missing value)
Dropbox Application (/Applications/Dropbox.app)
TuneupMyMac UNKNOWNHidden (missing value)
AdobeResourceSynchronizer ApplicationHidden (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
Google Drive ApplicationHidden (/Applications/Google Drive.app)
Google Chrome ApplicationHidden (/Applications/Google Chrome.app)
Internet Plug-ins: ℹ️
FlashPlayer-10.6: Version: 15.0.0.189 - SDK 10.6 Support
Default Browser: Version: 600 - SDK 10.10
AdobePDFViewerNPAPI: Version: 11.0.02 - SDK 10.6 Support
AdobePDFViewer: Version: 9.0.0 Support
Flash Player: Version: 15.0.0.189 - SDK 10.6 Support
o1dbrowserplugin: Version: 5.4.2.18903 Support
OfficeLiveBrowserPlugin: Version: 12.3.6 Support
QuickTime Plugin: Version: 7.7.3
googletalkbrowserplugin: Version: 5.4.2.18903 Support
Silverlight: Version: 5.1.10411.0 - SDK 10.6 Support
JavaAppletPlugin: Version: Java 7 Update 65 Check version
User Internet Plug-ins: ℹ️
Google Earth Web Plug-in: Version: 7.1 Support
Safari Extensions: ℹ️
OpenIE
3rd Party Preference Panes: ℹ️
Flash Player Support
Java Support
Time Machine: ℹ️
Time Machine not configured!
Top Processes by CPU: ℹ️
      7% WindowServer
      0% fontd
      0% Google Drive
      0% corestoraged
      0% com.apple.WebKit.Networking
Top Processes by Memory: ℹ️
159 MB com.apple.WebKit.WebContent
129 MB Keynote
129 MB Safari
116 MB mds_stores
94 MB Dropbox
Virtual Memory Information: ℹ️
167 MB Free RAM
1.60 GB Active RAM
1.45 GB Inactive RAM
1.07 GB Wired RAM
1.34 GB Page-ins
197 KB Page-outs

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