Hi Bruce,
I am impressed by your efforts. Unfortunately, I went back to Windows 7 a fortnight ago, so the trail (on my PC at least) is now cold. It is hard now to answer your questions but here is a go:
Q. Did the pop-ups appear immediately after you installed Magic Jigsaw Puzzles?
A. Certainly after, but I couldn't say how long after as I was spending most of my time finding my way around Windows 8 and installing a massive backlog of Windows Updates.
Q. Did you install Magic Jigsaw Puzzles directly from the Windows Store?
A. Yes.
Q. Did the pop-ups appear after installing another application or change?
A. No. I am pretty sure I had only installed Windows 8, then 8.1, Office 2010 and Magic Puzzles. I did install one or two other games from the Microsoft Store (e.g. card games Ok, I'm easily
pleased :-)) but it was only while running Magic Puzzles that the Liam.x virus kept popping up.
Q. Are you running any security software other than Windows Defender?
A. No.
Q. Are UAC, Windows Firewall, SmartScan, and Windows Defender enabled and up-to-date?
A. I couldn't tell you about SmartScan as I don't know what it is. As for the rest, whenever I build or rebuild a computer, setting up security, anti-virus and downloading the hundreds
of Windows Updates is always top priority. My computer was fully up to date in all these respects.
Q. Did you click any of the ads in Magic Jigsaw Puzzles?
A. Hmmm. Difficult to say. As a rule, I NEVER click on adverts but Windows 8.1 was a completely new interface - and extremely difficult to find ones way around initially. I can't promise you
I didn't click on an advert.
Bruce, as for your final point, i.e. if you feel that the app Magic Jigsaw Puzzles is responsible for these pop-ups you can report it in the Windows Store."
My answer to that is as follows: - Magic Jigsaw Puzzles is such a beautifully crafted game, I cannot believe its designer would spend all that time and then hide a virus in it. All I can
say is that the Liam.X virus popped up after I installed Magic Jigsaw Puzzles. And, it was only when actually running Magic Jigsaw Puzzles that the virus kept popping up.
It is also worth pointing out that, after Liam.x first struck, I scrapped everything and reinstalled Windows 8 from scratch, followed by 8.1 Office 2010 and Magic Jigsaw puzzles - only
to find that Liam.x had returned (or was still there).
I have been back on Windows 7 for the last fortnight and virus free.