Yes, tried malwarebytes, ccleaner registry cleaner, no luck getting rid of it so far. It turns random words on webpages into hyperlinks to the pop-ups. bummer. climate prediction software working fine now.

The crashes you had now are not the same type as the one you had before.

CPDN is sometimes a bit picky when a virus scanner scans the files it is currently working with, so once you have your computer clean, you could probably exclude the directories containing the CPDN files from beeing scanned in the future.

The crashes now look somewhat like one that Ritterm reported here on his Win7 x64 machine with the same BOINC version, maybe we could somehow figure out how he solved his problem.