Check your task tray by the clock to see if crossbrowser is running there, close it if it is.
Check your processes in Task Manager, close it there as well if you find it.
Check Add/Remove Programs in Control Panel, see if any of the malware has an uninstaller there. If so, run them.
Install malwarebytes and run a scan. Remove any traces that it finds.
I'd also recommend checking for any browser addons. Settings > Extensions in Chrome, and Tools > Manage Addons in IE.