This belongs in it's correct forum, Forum Suggestions and User assistance...Forum Suggestions & User Assistance IF it originated from Bike Forums. Off-site malware issues are not a topic in this forum or BF's responsibility, however, you should at least ask a moderator or administrator about it if you think if came from something on BF (the site cannot prevent these things 100% by design as they may be part of the ad package we get here) If you do get something like this see if you can copy the URL and paste it into your restricted sites list/blacklist/blocked sites from another page, THEN close out with Task Manager or similar, open a new browser window and clear your temporary files and start over.

Consult your computer professional about the incident now. You can probably reverse any damage.

As always, one way to prevent any malicious ad payloads is to become a paid subscriber (such as Titanium Club), which makes you ad-free at sign-in. When you do, try not to browse too much without being signed in, if that is what concerns you.