Go to: http://mxtoolbox.com/NetworkTools.aspx
Among the Network Tools, find “whatismyip” and click once on “IP and location”. (Do not tell us what your Internet IP address [aka “WAN IP” aka “Public IP”] is.)
Go to: http://mxtoolbox.com/blacklists.aspx
Enter your Internet IP address and click on the “Blacklist Check” button.
If your Internet IP address is blacklisted by more than 3 blacklisters and/or Spamhaus and Spamcop are among the blacklisters, then it’s possible that your machine is acting as a server to the Internet ... unbeknownst to you.
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Yet, your machine may otherwise be bogged down by excess cache files. Piriform’s CCleaner (the freed download) can help you with that.
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Also, despite your wish to not dig deeper into technical details ... you will learn some things by exploring the basics of the Event Viewer:
http://www.sevenforums.com/tutorials/226084-event-viewer-open-use-windows-7-a.html
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Lastly, anti-whatever processes can bog down your computer as they automagically download and install updates.
Same for Windows Updates.
You may find that your machine performs better by NOT allowing either update process to run automatically.
Same for Adobe software updating
BFLR