I found out, once again, thanks to my wonder webhost, that the problem with my inability to access my WordPress dashboard where I was erroneously directed to a “Page Not Found” was the permission of my wp-admin folder. Somehow, like the problem I faced earlier with 500 Internal Server Error, the permission of my folders was all changed to 777 instead of 755.
My wonderful host not only helped me to troubleshoot the problem but also helped me to change file permission as well as taught me how to do it so that I will know what to do next time.
What makes me wonder, though, is how come these affected blogs could have file permission changed just like that when I didn’t even do anything to my blogs; I didn’t make changes to my WordPress or plug ins. Heck, I didn’t even update my blog with posts. I am so puzzled.