Yes, it was a virus trying to scare you into buying bogus anti-virus software. If you had done that, you not only would have been ripped off for the purchase price, you might have had your credit card number stolen, and also gotten an even worse computer infection. AVG and Malwarebytes will hopefully quarantine this and allow you to delete it. If the problem recurs, start up your computer in Safe Mode and run your scans that way.

it can be done and once you figure out what it is it is very quick and easy unfortunately I can not remember but I did find it by googling and it was easy to find. I did post the info here for someone so searching here may turn it up also. Have you checked to make sure every single computer in the network has the same workgroup name and printer share name every thing has to be exactly the same on all. this is one site I did use Sharing Files In Windows 7 Setting up your HomeGroup Share a Printer on Your Network from Vista or XP to Windows 7 this one may be the one that helped me out do the directions given by jimbo45 be sure you use the actual names of your computers and printer instead of the example names he uses. 7 Printer sharing

I did try a music CD as well and nothing happened. Couldn't see a directory or play it. Today I put a clean CD in; a format menu box popped up; did that. Then dragged some folders to it (using Windows Explorer option). They copied. Popped out the CD and put in the old "unreadable" one and the burn menu showed again but this time with additional option to view contents, lo, there were all the folders. Why windows explorer couldn't read it before? Now the problem is trying to open a .jpg to view. When I click on one (I use IrfanView) all the filenames turn pale and the CD spins, and spins, and spins. The cursor remains as an hourglass. When I try to close the explorer window a message saying program not responding shows up and I choose end process to get the explorer window to close. I'm wondering if the old Roxio program I used to burn the CDs is the problem. Don't have Roxio on this computer.

ok first of all if you actually had got firefox all you would have got was firefox so if you got something that put a bunch of other stuff on your desktop and elsewhere then you got a bad link that was not the legit firefox download. Try to do the restore as Joe said before you installed the firefox. either way you need to run an updated malwarebytes scan immediately. I would also run a free updated superantispyware scan. You obviously have downloaded malware that is now taking over parts of the pc and affecting your pictures and files. We recently had some posts on how careful one has to be now when doing downloads because even sites that once were safe to download from are no longer trustworthy and we are seeing a lot of people ending up with something other than what they wanted. Do you remember where you got the download for mozilla firefox? Malwarebytes SUPERAntiSpyware both are free install update and run full scans let us know what was found.