Q: Cannot connect macbook Pro to HP4780 WiFi

So your problems lie with Windows and Parallel VM

if they deal with Mac:

Mac OS Printing/Fax (any version), OS X Lion, OS X Mountain Lion

http://www.apple.com/support/osx/

printing in OS X Mountain Lion

http://support.apple.com/kb/HT4670

Troubleshooting printer issues in Lion and ML

http://support.apple.com/kb/TS3147

Direct you to the proper forum for MacBook :

MacBook Series Forums

https://discussions.apple.com/community/notebooks?view=discussions

http://www.apple.com/support/macbookpro

Mac OS X Forum

https://discussions.apple.com/community/mac_os?view=discussions

This forum deals with a desktop/tower 65lb Mac Pro

http://www.apple.com/support/macpro