|Oh my. |
You need to make sure you read the instructions that came with the system to be sure.
Not sure what is going on.
Most OEM's supply a DVD that contains all the software or some other way to return the system to OEM state. That may be by using files on a hidden partition on the hard drive. (which now may be erased)
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10