Question Reinstalling windows 7

Impala640

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Jan 21, 2019
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Hi, I recently built a computer and it has been slow lately so I plan on reinstalling windows 7. I did a check to make sure it was not a corrupt drive which it isn’t. So I tried to download a windows 7 iso but since I have slow internet it would take 12 hours to download, so I looked on my laptop for a windows 7 iso image and found one but when I tested it on a virtual machine it said it was windows 7 generation 2 and on the first boot it started as if it were a windows 10 machine. Could someone please tell me if this is an ok thing to install on my machine and if it is just windows 10 with windows 7 theme or if it will slow my machine down thank you