AVD Manager
Hallo malcolmfowler,
you have two options. first reinstall the Android sdk and check that it is installed in a folder without spaces, the second is to make a link from one to the other. (it worked for me)
as i remember : the command is mklink -J like
MKLINK /J C:\users\Username\.android "C:\users\username\application data\.android"
do not forget the Quotation marks.
it works for me on Windows 7
best regards
Grobi