Q: I try to install the software, but a) nothing happens, b) it crashes, c) it gives me some obscure message.
A: First, please check that you have the latest release of the software:
http://www.virtualmechanics.com/downloads/. Once you have that, if you still have trouble, try the following steps.
If you see a message saying the program is not Win32 or is 16-bit, see the solution here.
If nothing happens after starting the installation or you see a brief window flash, the installer may be waiting for some other program to respond. Make sure that you do not have any other programs running.
Reboot your computer and try the install again.
Also, try looking in the Windows Task Manager's Process tab for any instances of 'iexplore.exe' running. If you see any, shutdown Internet Explorer, and then 'End Process' on any remaining 'iexplore.exe' processes (in the Task Manager's Process tab). Then try the installation again.
If you see any 'sitespinner.exe' processes in the task manager, try ending those and then try the installation again.
If you get a message that 'Invalid Windows Application', there is a good chance the software was corrupted during download. Try re-downloading the software (save it to a different location on your hard-drive), and try re-installing. You can check if the download was corrupt - see the information on how to do that here.
Finally, the problem might be related to rogue adware processes running on your system. You may want to check your system with utility for finding Adware or Spyware.