I recently noticed that my search function was not producing results that it should have. The results were mainly e-mails. Upon investigating, I found that my index was reduced to 189 items where it should have been in the order of 16,337 items. I tried to rebuild the index several times but it would always stop at 189. I eventually did a system restore and was able to do a rebuild to 16,337 items. A few days later the search index was reduced again to 189 items. Once again, repeated attempts to rebuild the index failed. I had to do a system restore again prior to rebuilding the index.
Does anyone know what is causing this problem?