Mouse and keyboard drivers not loading on windows 7

After installing windows 7 on a Lenovo ThinkCentre M600, keyboard and mouse worn't work. This computer uses only usb 3.0 ports to connect devices. I'll appreciate any suggestions. Thanks
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Lee W, MVPTechnology and Business Process AdvisorCommented:
You have to pre-load the drivers into the Windows 7 image you're installing.  Intel has a guide / utility to do this:

Additionally, I got my NUC installed via PXE boot to a Windows 7 install image with updated drivers through Windows Deployment Server (the intel utility I mentioned didn't work for me, but I only tried it once and when it hung, I just decided to use EDS).

Another guide here:

And keep in mind, Windows 7 isn't supported on the newest Intel CPUs - even if you get it installed, you may not get important security updates because of the lack of support.  You really should be using Windows 10 and if you need Windows 7 for a specific reason, run it in a VM.

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Rajat SehgalFounder Enhance TechnologyCommented:
It cause by missing usb drivers, You should try to install win 7 from bootable usb drive.
you could also ask lenovo for a system reset cd for windows 7; here an article that can help :
FCHCAdminAuthor Commented:
Thank you all for your help
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