This crack is for Popupcop version 1.1.0.8 only.
Put popcrk.exe in the folde (directory) that popupcop.dll
resides in eg .. (root):\program Files\Popupcop
Make sure IExplorer is NOT running
Run popcrk.exe
Run Iexplorer
Select Register PopupCop
The Username must be at least 5 chars
The RegCode (password) must be 15 chars no more no less
eg.
Name : Hello
RegCode: 123456789054321 << 15 chars
it can be anything have fun.