I have: Avast Home 4.7.1074, Windows XP/SP2 w/all updates.
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When avast scans D:\Program Files\Microsoft .NET\#.dotnetfx.v1.1.exe (the actual MS download file name is dotnetfx.exe; I modify it), I get this result:
D:\Program Files\Microsoft .NET\#.dotnetfx.v1.1.exe\[Embedded#000ee12]\msi.dll [E] CAB archive is corrupted. (42127)
And when Avast scans D:\CDs\VRMPCCP_EN (Windows XP Pro Upgrade wSP2)\DOTNETFX\DOTNETFX.EXE, which is a file copied straight from the original, legitimate, OS CD, I get this result:
D:\CDs\VRMPCCP_EN (Windows XP Pro Upgrade wSP2)\DOTNETFX\DOTNETFX.EXE\[Embedded#000ee12]\msi.dll [E] CAB archive is corrupted. (42127)
Note that \[Embedded#000ee12]\msi.dll is appended to both file names.
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Do I need to be concerned about this?