The current version of Antivir Personal slows down Visual Studio 2010 making it unbearable to develop ASP.NET applications.
Debugging with active Antivir: appr. 5min for an empty Default.aspx page to display.
Debugging with deactivated Antivir: a few seconds for an empty Default.aspx page to display.
Until Antivir fixes this bug I will give Microsoft Security Essentials a try.
Regression because this has been addressed and fixed in December 2010:
This applies to the following version of Antivir:
Produktversion 10.2.0.696 29.06.2011
Suchengine 8.02.06.04 06.07.2011
Virendefinitionsdatei 7.11.11.27 07.07.2011
Control Center 10.00.12.31 28.06.2011
Config Center 10.00.13.20 28.06.2011
Luke Filewalker 10.03.00.07 28.06.2011
AntiVir Guard 10.00.01.59 28.06.2011
Filter 10.00.26.09 28.06.2011
AntiVir WebGuard 10.01.09.00 28.06.2011
Planer 10.00.00.21 02.05.2011
Updater 10.00.00.39 21.06.2011