Hi PHS IT,
Click on Start, Click Run and type gpedit.msc
Expand Computer Configuration, then Windows Settings, then Security Settings, then Local Policies, and then Security Options
Click on Network security: LAN Manager Authentication level
Choose the Authentication Level as "Send NTLM 2 Response Only" from the drop down menu
Check this article :
http://www.symantec.com/docs/TECH95594