Thank you, Bob.
Here are the results:
Problem description:
It has suddenly become difficult to have iTunes, Mail & Safari open concurrently without slowing way down.
EtreCheck version: 2.2 (132)
Report generated 4/20/15 8:57 AM
Download EtreCheck from http://etresoft.com/etrecheck
Hardware Information: ℹ️
Mac mini (Mid 2011) (Technical Specifications)
Mac mini - model: Macmini5,1
1 2.3 GHz Intel Core i5 CPU: 2-core
2 GB RAM
BANK 0/DIMM0
1 GB DDR3 1333 MHz ok
BANK 1/DIMM0
1 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
Intel HD Graphics 3000 - VRAM: 288 MB
S200HL 1600 x 900 @ 60 Hz
System Software: ℹ️
Mac OS X 10.7.5 (11G63) - Time since boot: 2 days 13:59:29
Disk Information: ℹ️
TOSHIBA MK5065GSXF disk0 : (500.11 GB)
disk0s1 (disk0s1) <not mounted> : 210 MB
Bodhisattva (disk0s2) / : 499.25 GB (361.65 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information: ℹ️
Vimicro Corp. Sirius USB2.0 Camera
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. MacBook Air SuperDrive
Alps Electric Hub in Apple USB Keyboard
Alps Electric Apple USB Keyboard
Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
Apple, Inc. Mac mini
Launch Agents: ℹ️
[running] com.flipvideo.FlipShare.AutoRun.plist [Click for support]
[loaded] com.google.keystone.agent.plist [Click for support]
[loaded] com.oracle.java.Java-Updater.plist [Click for support]
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist [Click for support]
[loaded] com.google.keystone.daemon.plist [Click for support]
[loaded] com.oracle.java.Helper-Tool.plist [Click for support]
[loaded] com.oracle.java.JavaUpdateHelper.plist [Click for support]
User Launch Agents: ℹ️
[loaded] com.adobe.ARM.[...].plist [Click for support]
[loaded] com.citrixonline.GoToMeeting.G2MUpdate.plist [Click for support]
User Login Items: ℹ️
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
SpeechSynthesisServer Application (/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks /SpeechSynthesis.framework/Versions/A/SpeechSynthesisServer.app)
HD Cleaner UNKNOWN (missing value)
AdobeResourceSynchronizer Application (/Applications/Adobe Reader.app/Contents/Support/AdobeResourceSynchronizer.app)
RealPlayer Downloader Agent Application (/Users/[redacted]/Library/Application Support/RealNetworks/RealPlayer Downloader Agent.app)
Internet Plug-ins: ℹ️
DirectorShockwave: Version: 11.0.0r458 [Click for support]
o1dbrowserplugin: Version: 5.41.0.0 - SDK 10.8 [Click for support]
Flip4Mac WMV Plugin: Version: 3.2.0.16 - SDK 10.8 [Click for support]
RealPlayer Plugin: Version: Unknown [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]
Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
Flash Player: Version: 17.0.0.169 - SDK 10.6 [Click for support]
iPhotoPhotocast: Version: 6.0
googletalkbrowserplugin: Version: 5.41.0.0 - SDK 10.8 [Click for support]
QuickTime Plugin: Version: 7.7.1
AdobePDFViewer: Version: 11.0.10 - SDK 10.6 [Click for support]
CouponPrinter-FireFox_v2: Version: Version 1.1.7 - SDK 10.5 [Click for support]
Yahoo! Installer: Version: 1.0.105 [Click for support]
JavaAppletPlugin: Version: Java 8 Update 31 Check version
User internet Plug-ins: ℹ️
CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 [Click for support]
Safari Extensions: ℹ️
AdBlock
DuckDuckGo
Ecosia - The search engine that plants trees
3rd Party Preference Panes: ℹ️
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
3% PluginProcess
2% coreaudiod
2% WindowServer
1% iTunes
1% fontd
Top Processes by Memory: ℹ️
272 MB WebProcess
158 MB Safari
88 MB PluginProcess
55 MB iTunes
53 MB Finder
Virtual Memory Information: ℹ️
128 MB Free RAM
1.87 GB Used RAM
2.08 GB Swap Used
Diagnostics Information: ℹ️
Apr 19, 2015, 02:55:37 PM /Users/[redacted]/Library/Logs/DiagnosticReports/helpd_2015-04-19-145537_[redac ted].crash
Apr 19, 2015, 10:51:10 AM /Library/Logs/DiagnosticReports/PluginProcess_2015-04-19-105110_[redacted].cras h
Apr 17, 2015, 06:55:51 PM Self test - passed
Apr 17, 2015, 02:39:47 PM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-04-17-14 3947_[redacted].crash
Apr 18, 2015, 05:31:33 PM /Library/Logs/DiagnosticReports/PluginProcess_2015-04-18-173133_[redacted].cras h
Apr 17, 2015, 03:33:29 PM /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-04-17-15 3329_[redacted].crash