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FF 4.0.1 gets Bad Request - Invalid Verb [HTTP Error 400. The request verb is invalid.] on MSDN when ESET Node32 installed

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FF 4.0.1 gets "Bad Request - Invalid Verb" [HTTP Error 400. The request verb is invalid.] on MSDN when ESET Node32 installed.

I have the latest version of ESET Nod32 installed [4.0.417.0] and always get this error with this and the previous beta version of FF4 unless I disable Nod32 "Web Access Protection". This does not happen with IE9. OS is Windows 7 x64 and is up to date. This has happened since I installed V4 of FF last November. I have tried everything I can think of but only disabling Nod32 web access protection allows MSDN to work. Other sites are fine.

This happens merely going to http://msdn.microsoft.com

FF 4.0.1 gets "Bad Request - Invalid Verb" [HTTP Error 400. The request verb is invalid.] on MSDN when ESET Node32 installed. I have the latest version of ESET Nod32 installed [4.0.417.0] and always get this error with this and the previous beta version of FF4 unless I disable Nod32 "Web Access Protection". This does not happen with IE9. OS is Windows 7 x64 and is up to date. This has happened since I installed V4 of FF last November. I have tried everything I can think of but only disabling Nod32 web access protection allows MSDN to work. Other sites are fine. This happens merely going to http://msdn.microsoft.com

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This issue can be caused by corrupted cookies.

Clear the cache and the cookies from sites that cause problems.

  • "Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
  • "Remove the Cookies" from sites causing problems: Tools > Options > Privacy > Cookies: "Show Cookies"
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@Cor-el - thanks. I have tried this in the past and it did not work. I did however install the latest version of Nod32 last night and the problem seems to have gone away. I had tried uninstalling/reinstalling in the past which also did not work for longer than 5 minutes. Eset must have had a bad version and the new version fixed the issue even though they claimed they did not have any issues. Dave