The most annoying thing with running windows in a Parallels virtual machine, is that the default key mappings for navigating text is different between windows and OS X:
Windows:
Go to end of line = End
Go to start of line = Home
Go to next word = control-right arrow
Go to previous word = control-left arrow
OS X:
Go to end of line = command-right arrow
Go to start of line = comand-left arrow
Go to next word = option(alt)-right arrow
Go to previous word = option(alt)-left...