SBS 2011 - Slow printing and Shared file access

I've recently migrated from SBS 2003 to SBS 2011 and having problems the below issues:-

All users on the Network experiencing slow access to shared drive for Microsoft products ie. Excel spreadsheets, Word documents
Seems slower on the Windows7 machine than XP (Slow = 45-60 sec to open small word doc)
Opening PDF's is ok, but saving is slow
Printing was slow but since I've installed a universal driver PCL 6 driver on the server it's as it should be. This is fine as long as you don't edit the document the from print> landscape> colour > BW etc
MYOB working ok but converting to PDF is an issue

Steps We took:-

Migrated from Server SBS 2003 to 2011 using Microsoft Migration Handbook using (http://www.microsoft.com/en-au/download/details.aspx?id=14570)
Had a heap of errors with roles and permissions of roles downloaded and installed 1.5GB of updates and hotfixes, demoted the original DC and took it off the Domain which fixed a lot of our errors.
Installed SP1
done this (http://support.microsoft.com/kb/951037)
and this http://support.microsoft.com/kb/2493361
Tweaked Bullgaurd AV on Server and all machines (tried disabling also).
Checked over Group Policy settings
Disabled IPv6 in registry and across all client machines
Turned off Dual NIC's as apparently SBS2011 doesnt like it
Switched all Exchange related services to manual as not required using a hosted solution
Stopped File Server Storage Reports Service

Possible Solutions?:-

I think this may resolve issue .....http://www.petri.co.il/how-to-disable-smb-2-on-windows-vista-or-server-2008.htm

Any assistance would be hugely appreciated