I am having the same problem discussed here:.
I don't know what I did but my attribute table is now lurking somewhere but I can't find it. I use only one monitor. The previous question was resolved by right clicking on the taskbar and selecting "show windows stacked." However, I have tried right-clicking everywhere and I haven't seen an option for "show windows stacked."
I've tried quitting ArcMap but nothing changed. I do not want to have to reinstall ArcGIS nor do I want to have to change the registry. Thank you for your help!