Okay, first let's work on getting Firefox working. Never mind anything else.

Download Firefox For All languages And Systems {web link} Save the file. Then;

Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86) Mac: Open the "Applications" folder. Linux: Check your user manual.

Look for, and rename any Mozilla or Firefox folders by adding .old to them.

After rebooting the computer, run a registry scanner. Then run the installer. If all goes well, remove the OLD folders when you are done.

Brilliant, Fred, thanks loads. As you can see, it worked. I had uninstalled it and downloaded it from my usual place (filehippo), then installed it, but didnt think of the registry scanner bit ....... Thanks again ..... B-)

P.S. can you help with the Flashplayer problem, or should i post that as a seperate problem?

You can try to uninstall and reinstall Flash.

• https://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html
• http://www.adobe.com/special/products/flashplayer/fp_distribution3.html

You can check for problems with current Shockwave Flash plugin versions and hardware acceleration in Firefox and try this:

• make sure you have the latest Flash version:
  http://www.adobe.com/special/products/flashplayer/fp_distribution3.html
• check for updates for your graphics drive drivers
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
• disable protected mode in the Flash plugin (Windows Vista and later)
  https://support.mozilla.org/kb/adobe-flash-protected-mode-firefox
• disable hardware acceleration in the Flash plugin
  https://helpx.adobe.com/flash-player/kb/video-playback-issues.html
• disable hardware acceleration in Firefox
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

See also:

• http://kb.mozillazine.org/Flash#Troubleshooting

Great to hear. What about your other problems?

on my other computer, Firefox v44 won't even start-up and doesn't like the new adobe flash player. I'll try the complete fresh install, like you suggested above to cure the start-up problem, but will that cure the flash player problem? ..... B-)

P.S. I've tried the uninstalling/re-installing thing on both those programs, but again, without the registry cleaner bit

markshac62 said

without the registry cleaner

If there is a bad entry, it might cause trouble.

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. Is the problem still there?

While still in Safe Mode,

Type about:support in the address bar and press Enter. Under the main banner, press the button; Copy Text To Clipboard.. Then in the reply box at the bottom of this page, do a right click in the box and select Paste. This will show us your system details. No Personal Information Is Collected.

At the moment, it seems the problem is solved ..... just after i sent my last message, i thought, well what ever your reply is, i've got to put v44 back on, so i might as well do it, the way i just have on my 1st tower. Did that, then without thinking, instead of clicking on IE to come here, force of habit, i clicked on Firefox and it fired up 1st time .... an added bonus is, i dont seem to have the secondary problem with the flash player either ... (touch wood). If i do, i'll keep your advice above handy, but at the moment, it looks like you've struck gold again ........ thank you very much for all your help Fred, your a star ........ B-)

Glad to help. Safe Surfing. If the problem should return, please go to the top of any support.mozilla.org web page and use the Ask A Question link; https://support.mozilla.org/en-US/questions/new This will let us look at your system details. No Personal Information Is Collected.