downloaded update to El Capitan and now computer works poorly
Since downloading El Capitan update my wireless router and internet connection have been working intermittently
iMac, OS X El Capitan (10.11.1)
Go step by step by step and test.
1. Power off the router. Unplug it from the wall. Wait a while.
Plug it back to the wall. Power the router on. Wait until all lights are lit properly. It will take a while.
Restart the computer.
Start up in Safe Mode.
https://support.apple.com/kb/PH18760?locale=en_US
2. Delete Caches.db
Close all windows and quit all applications.
Hold "option" key down and click "Go" menu in the Finder menu bar.
Select "Library" from the dropdown.
Library > Caches > com.apple.Safari > Caches.db
Right click the Caches.db file and select "Move To Trash”.
Close windows.
Restart and relaunch Safari.