How old is the PC?
Have the problems been happening since the PC was new, or are the problems more recent?
Which problem/problems did the Tech Guys create in your opinion?
What problem/problems is the PC suffering from at the moment?
It appears that the Tech Guys are trying hard to fix the problems. Motherboard drivers should be readily available from the manufacturer's website, but I agree, they should have had the motherboard CD when installing the new motherboard.
It's unclear if you want consumer advice or computer help advice?