I have quite a few of my thinapps that won't print when they are run on Windows 7 64 bit machines. They print fine when they are on Windows XP 32 bit boxes.
I capture from a clean Windows XP 32 bit virtual machine. XP SP3 and IE8 are slipstreamed in, but nothing else is added to that VM before my captures. I used Thinapp 4.7.2 for most of the captures.
My thinapps that are having trouble printing on Win7 64bit range from simple java applications to some complex captures such as Lotus Notes. I have tried deleting the spool folder from may captures and it makes no difference. The thinapp will still print to any natively installed printer in XP but not in Win7 64bit.
My Lotus Notes thinapp actually complains about a memory error when trying to print if it is running on a Win7 64bit machine.