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Since this is a new laptop, you have two options. Use the warranty or reinstall the system.
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mkramer777

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You could swap disks about to prove it's not software/OS related.
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That’s a great idea to try and swap out doaks. I think I will try that
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So was the hardware different?
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I have purchased 5 Dell Inspiron 5575 and 4 of the 5 are just fine but 1 of them is really slow. &nbsp;I have setup each computer on the domain and installed office 365. &nbsp;That is all that has been done. &nbsp;The problem computer cannot even bring up &quot;this PC&quot; at an acceptable speed. &nbsp;It takes about 20 seconds to show the contents. The other 4 computers take 3 seconds or less. &nbsp;Any ideas other than this one is a lemon?
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I have purchased 5 Dell Inspiron 5575 and 4 of the 5 are just fine but 1 of them is really slow.  I have setup each computer on the domain and installed office 365.  That is all that has been done.  The problem computer cannot even bring up "this PC" at an acceptable speed.  It takes about 20 seconds to show the contents. The other 4 computers take 3 seconds or less.  Any ideas other than this one is a lemon?

4 out of 5 Dell laptops of the same model number are fast and 1 is very slow

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