What caused it?
Is it harmful?
How to fix?
Read this blog to get the answer:
Know about Error Code UR97L1DA2TA pop-up
Error code UR97L1DA2TA pop-up can be seen on different browsers like Firefox, Chrome and IE. It claims that your firewall have blocked TCP connection.
Be careful, this message is offering false information. The main purpose of such a pop-up is to mislead users to dial the so-called tech support number like 860-269-6628, and victims will finally be required to download some dubious programs or buy some services to fix this non-existed errors. The removal tool offered by the dubious tech support can't be trusted, even when it is claimed to be free. There can be trojans in it and your banking information will be leaked out and suffer great financial loss. You must not believe a word from this pop-up.
This pop-up may appear on your browsers frequently and try to take you in the scams. The malicious ad is supported by some harmful plugins in your computers. The efficient way to stop this pop-up is to remove all the related plugins and clean up the browsers completely.
