what operating system are you using? if vista, try this fix.
click start>computer
double click c drive>program files>Electric Quilt 6
open the EQ6 folder and look for the red/white EQ6.EXE file (application file)
right click on it and choose run as administrator in the menu
click allow
this is the fix for the error 42 code. It may help, it definitely won't hurt anything. check your virus protection, firewall or pop up blocker to see if they are blocking a portion of the application from loading. You may need to disable them temporarily and try the install again.