I haven't had time to work on this until yesterday. I made a repair CD from another computer with the same operating system. Put it in and no luck. I removed/replaced the SATA cable for the C drive, this time I installed a cable with locking clips, and I removed all the other hard drives from the system. This time it booted with the message that windows had not been shut down properly. It seems to be working properly now. I think the initial problem was a loose SATA cable.
Thanks for your input, Mike!