My MacBook is running extremely slowly after installing Yosemite. How can I find out the problem and remedy?

EtreCheck version: 2.2 (132)

Report generated 4/29/15, 1:35 AM

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Hardware Information: ℹ️

MacBook Pro (13-inch, Mid 2010) (Technical Specifications)

MacBook Pro - model: MacBookPro7,1

1 2.4 GHz Intel Core 2 Duo CPU: 2-core

4 GB RAM Upgradeable

BANK 0/DIMM0

2 GB DDR3 1067 MHz ok

BANK 1/DIMM0

2 GB DDR3 1067 MHz ok

Bluetooth: Old - Handoff/Airdrop2 not supported

Wireless: en1: 802.11 a/b/g/n

Battery: Health = Normal - Cycle count = 461 - SN = 9G0440XYGD3NB

Video Information: ℹ️

NVIDIA GeForce 320M - VRAM: 256 MB

Color LCD 1280 x 800

System Software: ℹ️

OS X 10.10.2 (14C109) - Time since boot: 3:30:47

Disk Information: ℹ️

Hitachi HTS545025B9SA02 disk0 : (250.06 GB)

EFI (disk0s1) <not mounted> : 210 MB

Macintosh HD (disk0s2) / : 249.20 GB (139.40 GB free)

Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB

MATSHITADVD-R UJ-898

USB Information: ℹ️

Apple Inc. Built-in iSight

Apple Internal Memory Card Reader

Apple Inc. BRCM2046 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Computer, Inc. IR Receiver

Apple Inc. Apple Internal Keyboard / Trackpad

Gatekeeper: ℹ️

Mac App Store and identified developers

Kernel Extensions: ℹ️

/Library/Extensions

[loaded] com.sophos.driver.devctrl (9.2.50 - SDK 10.6) [Click for support]

[loaded] com.sophos.kext.sav (9.2.50 - SDK 10.8) [Click for support]

[loaded] com.sophos.nke.swi (9.2.50 - SDK 10.8) [Click for support]

Launch Agents: ℹ️

[loaded] com.oracle.java.Java-Updater.plist [Click for support]

[running] com.sophos.uiserver.plist [Click for support]

Launch Daemons: ℹ️

[loaded] com.adobe.fpsaud.plist [Click for support]

[loaded] com.microsoft.office.licensing.helper.plist [Click for support]

[loaded] com.oracle.java.Helper-Tool.plist [Click for support]

[running] com.sophos.common.servicemanager.plist [Click for support]

User Launch Agents: ℹ️

[loaded] com.adobe.ARM.[...].plist [Click for support]

[loaded] com.divx.agent.postinstall.plist [Click for support]

[failed] com.facebook.videochat.[redacted].plist [Click for support]

[loaded] com.google.keystone.agent.plist [Click for support]

[running] com.spotify.webhelper.plist [Click for support]

User Login Items: ℹ️

iTunesHelper UNKNOWN (missing value)

Internet Plug-ins: ℹ️

OVSHelper: Version: 1.1 [Click for support]

Default Browser: Version: 600 - SDK 10.10

Flip4Mac WMV Plugin: Version: 2.4.4.2 [Click for support]

AdobePDFViewerNPAPI: Version: 11.0.10 - SDK 10.6 [Click for support]

FlashPlayer-10.6: Version: 17.0.0.169 - SDK 10.6 [Click for support]

DivXBrowserPlugin: Version: 2.2 [Click for support]

Silverlight: Version: 5.1.10516.0 - SDK 10.6 [Click for support]

Flash Player: Version: 17.0.0.169 - SDK 10.6 [Click for support]

QuickTime Plugin: Version: 7.7.3

iPhotoPhotocast: Version: 7.0 - SDK 10.7

SharePointBrowserPlugin: Version: 14.1.0 [Click for support]

AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Click for support]

JavaAppletPlugin: Version: Java 8 Update 25 Check version

User internet Plug-ins: ℹ️

WebEx64: Version: 1.0 - SDK 10.5 [Click for support]

Safari Extensions: ℹ️

Searchme Adware! [Click to remove]

Slick Savings Adware! [Click to remove]

DivX Plus Web Player HTML5 <video>

Ebay Shopping Assistant Adware! [Click to remove]

3rd Party Preference Panes: ℹ️

DivX [Click for support]

Flash Player [Click for support]

Flip4Mac WMV [Click for support]

Java [Click for support]

Time Machine: ℹ️

Time Machine not configured!

Top Processes by CPU: ℹ️

185% installd

2% WindowServer

2% mds

2% fseventsd

0% hidd

Top Processes by Memory: ℹ️

432 MB kernel_task

352 MB com.apple.WebKit.WebContent(3)

270 MB installd

152 MB Safari

90 MB softwareupdated

Virtual Memory Information: ℹ️

527 MB Free RAM

3.48 GB Used RAM

2 MB Swap Used

Diagnostics Information: ℹ️

Apr 28, 2015, 09:58:51 PM Self test - passed