Any decent computer manufacturer should have all drivers available from their web site, available by putting in your model number or serial number. (Apple is the only exception to this rule, for obvious reasons)

Reformatting doesn't get rid of the drivers, it gets rid of the free trials for games, for print cartridge reording software, the crippled Microsoft office, the 60 day antivirus software trial, the keylogger that sends all keystrokes back to Dell/Sony/Toshiba, the windows install they've migrated over three laptop models because even their employees don't want to make a new image with all that crap, and the like. Reformat. Reinstall drivers. Don't reinstall crap. You'll be glad you did.