turn off system restore when you delete the files, viruses will hide there and restoring to an older point is more than likely not going to help. Run all of your scans and remove any bad files in safe mode.
Run hijackthis, paste your log file here HijackThis Logfileauswertung remove anything it says is nasty. For IE AV specifically try SmitFraudFix its know ti fix that particular bug
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