I seem to have a collection of malfunctions; when I open the internet, or sometimes go to a new website, a "shooting game" goes across the screen. On internet pages, including this site, random words are in green, as links. When I put the cursor over them I get a pop-up ad re "saveupto70%.com."
In my preview of this post, "shooting game" has a link to an ad for bingo, "Windows" has a link to an ad for Windows7 support, "Norton" has a link to an ad for Norton technical support. All the ads are in the same small box format, with "click here" in red.
At times I get the audio for an ad which I can't see. Today Windows crashed. Yesterday Firefox crashed several times, but hasn't since I took the actions below.
My PC is using Windows7
When I came back from a holiday I found my sweetie had downloaded Optimizer Pro which kept popping up to tell me the PC was infected. I Ran Norton but did not find anything. I looked for that Optimizer Pro on this site - couldn't find any reference to it so I just uninstalled it. I also ran Spambayes which I had on my PC from a previous episode. That got rid of the ALOT toolbar, Torch and something else.
I also downloaded and ran Adwcleaner and got rid of a lot of PUP somethings. Sorry I should take better notes next time - ah, but I have saved the results of the scans so could send those.
Feeling a little foolish as these are self-inflicted injuries - but "what you can do?"
Thanks in advance for help.