Frequently Asked Questions
Make sure you install the software as an administrator and that User Account Control (UAC) is set to its lowest setting. If you still have install issues, then this is most certainly caused by a security product on your system, or an error with system memory.
You can try rebooting in Safe Mode and try the installer from there. This would disable computer security products that cannot be properly disabled manually (which is common).
You can go to http://memtest86.com/download.html for a memory test program.