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What's most important is that when you boot into Clean Install Windows 7 during Steps 6 and 7 delete all partitions to create and Format New as you please, or just click Next and the installer will do that for you.
Next most important of the steps in Clean Reinstall - Factory OEM Windows 7 is have the network driver in your backup so if the installer doesn't provide it (it will often start up connected if plugged in by wire) you can install it. connect to run all rounds of Important and Optional Windows Updates, after enabling Device Installation Settings Option 3.
After all Updates are installed with requested reboots any drivers still missing in Device Manager can be found on the Support Downloads webpage for the PC or Device. We can help you find these.
Give plenty of time between each subsequent program install to see how they affect performance, report back any issues.