Hi,
Just some advice... Don't pay for anything, except for some assistance from Staples possibly... I don't know what they installed for you...
If someone is charging for drivers and such, you are looking at someone's corrupt website... There are free alternatives to WinZip... 7-Zip is probably the best...
Drivers are available from MSI, and the ones that are not are free from the device manufacturer... Even 3rd party sites provide free drivers...
I don't know what you have in the way of media to Restore To Factory, but the way things sound, that may be the best option... You may be able to purchase any media you need from MSI, or possibly create your own from the factory Recovery Partition if available..
It sounds like so many changes have been made to the machine that nothing at this point is going to make it "Normal" again except Restoring To Factory condition...