I think I may have seen something about this before, but I can't seem to find it now. Any advice? I was stupidly using IE (and not as usual Firefox) when I got a "IE must close" error. When I submitted it, this was the reply from MS. Error caused by NOD32 Antivirus System: no specific solution available Thank you for submitting an error report. Problem description An analyst at Microsoft has investigated this problem and determined that an unknown error occurred in NOD32 Antivirus System. This software was created by Eset. Recommendation Microsoft has researched this problem with Eset, and they do not currently have a solution for the problem that you reported. Below is a recommendation to take that may help prevent the problem from recurring. * Contact Eset for support or product updates. Additional information If this problem continues to occur with the latest product updates for NOD32 Antivirus System, we recommend you obtain assistance and troubleshooting information directly from Eset.