Doubled processor and ram and pc still slow?

  Charlestifft 20:21 02 Apr 2018

I have a HP Compaq 6305-SFF desktop computer..

Upgraded the process to a 3.6ghz quad core(a10-5700) And upgraded ram from 8 to 16gb, plus i just put in a 2TB refurbished harddrive.

Why is my pc even slower now i feel like than it was before i upgraded.

Please help!

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