|This is of no use to anyone really. I hate to say that.|
There are many ways to boot a computer. One is a CD/DVD, another is a hard drive. Some computers allow you to boot from a network with a process called PXE. That is how you got the PXE error. Your system was set to boot to or the last choice was network boot.
Understanding and correcting the correct bios entry may have been a better repair.
I do fix a lot of stuff that way however. I may not know how to fix it correctly but it gets fixed. I get paid to do that too.
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10