Del optiplex 760 running slow

Hello

I have problems with the computer running slow, tried to reinstall windows 7 and Dell diagnostics, but he doesn't ever show results... Tried to download the update of drivers for change the bios but still no change... much hair pulling not sure of what to do next any ideas would be appreciated cheers

How do you reinstall, did you clean install?

http://dellwindowsreinstallationguide.com/a-clean-install-of-Windows/

In the Task Manager, which is the use of the CPU and memory and which execute background tasks?

What CPU is installed? All the cores of the processor are displayed in the Task Manager?

Tags: Dell Desktop

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