Hi, I'm Nathan.Sorry to hear that you're having trouble with this but I'll do my best to help you.
Registration is not going to work for this printer for 2 reasons - she may have previously registered it, and even if she didn't it wouldn't be accepted because this is quite an old model that is no longer supported, there is no warranty for it, and so there is no benefit to registering.
As for the printing issues, there are several other concerns there, are you sure you're on windows 7 and not updated to windows 10?
Okay did you use the disc that came with the printer to install it?
So how did you install the printer?
The phone is not going to work, it isn't supported.
For the windows 7, you need to use this driver: http://support.lexmark.com/index?docLocale=en_US&page=content&segType=recommendedSegmentOS&id=DR16121&locale=EN&userlocale=EN
Hello, it appears your question is still open.
Do you need more help with this?
Please note: You have already paid your fee to the site; I'd like to help you and provide value for that fee, but I do need to communicate with you here to do so.