New submitter maeltor writes "Reports poured in this morning that Microsoft's security products, namely Microsoft Security Essentials and Forefront Client Security, were flagging Google Chrome as a virus (PWS:Win32/Zbot) and removing the browser if users chose to clean and reboot their machines. Users reported that the only way to mitigate the problem was to set MSE and Forefront to 'always allow' Zbot, which is generally considered to be a bad idea."
A Google employee in the above support thread notes that Microsoft has now pushed another update to resolve the issue
. "On September 30th, 2011, an incorrect detection for PWS:Win32/Zbot was identified. On September 30th, 2011, Microsoft released an update that addresses the issue. Signature versions 1.113.672.0 and higher include this update."