Windows 7 Professional 64 bit with Norton 360 and IE 11. For the past several weeks, my desktop will self-open two or three IE11 windows within 15 - 20 minutes after startup. The windows always have different web addresses, and the addresses change every day. They are consistent in that one of the windows has a security warning that some software needs updating. If one attempts to close the windows with the standard upper right corner X, multiple other windows open. I generally use Task Manager to end the IE11 process to close the windows. In the early weeks, I would receive an Intrusion Detection message from Norton and the IE windows would be blank. I no longer receive the Norton messages and the windows contain data. The web addresses contain ".static" in the address.
My Norton 360 is always up to date. I have run Norton Scans, Norton Power Eraser and deleted cookies all without success. The scans show nothing malicious other than cookies which are removed. I also manually delete cookies at the end of a day that I have not run a scan. Still without success. Any advice on how to remove the nuisance (at a minimum) is appreciated.