This is not XP. Windows 7 is the first driver-complete OS in the installer, quickly updated via optional Windows Update after enabling Automatically get recommended drivers and updates for your hardware.
Only after all Updates are done should you import any drivers still missing in Device Manager from Support Downloads webpage for your tag number.
What I would do is follow these steps to assure a perfect Clean Reinstall - Factory OEM Windows 7
paying close attention to how drivers are handled, and the tools and methods which work best for Windows 7.
If you want to try to undo what you've already done, then boot installer into Repair console on second screen and run Startup Repair. If it doesn't offer it, run System Restore from the System Recovery Options