Firefox Windows Won't Come Forward When Taskbar Button Is Clicked (Solution)
I posted this issue once before, but the thread was closed, so I am opening a new thread so that I can share the solution.
My problem was that many of my Firefox windows wouldn't come forward when I clicked their taskbar buttons. What that meant was that the content of those windows was permanently lost to me since there was no way to look at them. Reducing the number of windows by closing the ones I could access didn't seem to work.
After complaining here in the forum, I discovered that I had a virus on my computer. I believe it was a root-kit virus, but I don't remember for sure (I don't think the type of virus will have much meaning to most people anyway). Blocking windows and programs from opening is a common behavior of viruses. In fact, many viruses will prevent your anti-virus program from opening, so there is no way for you to scrub the virus from your computer.
All the anti-virus companies (AVG, Symantec, McAfee, etc.) now offer a service where one of their technicians will access your computer remotely and scrub any viruses from your computer. The cost is in the range of $100 to $150. I paid AVG $135 (I found out later that other companies were cheaper). The technician was in another country (the Philippines, I think). Despite that, the technician was very competent and did a good job of eliminating the virus. Once the virus was gone, all my windows opened without a problem. After this experience, I called around to the other companies and found that some of them use technicians in India and some in the Philippines.
So if you are having the problem of programs or windows that won't open, this is the solution.