I am using Parallels 7 on a MAC. Windows XP is my virtual machine. I cannot change the default printer in Windows. It is locked on an HP laserjet. The other printer is a Lexmark 901Pro connected via USB. This printer prints in Windows if I select it. BUT, the Lex won't scan in Windows. It will scan from the MAC. The Lex support says I have to make the Lex the default printer in order to get the scan to function. In the Printers part of the control panel, the HP is checked as default. I go to the Lex in the printer list and click on "make default". Nothing happens. The HP remains the default printer. Why?