Windows Update 0x80070643 error fix

If you are getting 0x80070643 error while doing windows update, this may be because of downloaded setup files are corrupted.

There were some problems installing updates, but we’ll try again later. If you keep seeing this and want to search the web or contact support for information, this may help: (0x80070643)

To fix this error, move latest downloaded files from “C:\ProgramData\Package Cache” to another backup folder. To do this, sort this folder by “Date Modified” and move the folder that has the same date.

Then if you try Windows Update again, error would be gone and Windows Update would install the updates.

Note: If this doesn’t work, move back those backed-up folders back…

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A potentially dangerous Request.Form value was detected from the client

If you get “A potentially dangerous Request.Form value was detected from the client” when you use Rich Text Editor or TextArea in your web projects. You can get this error if any html code is submitted from your form.

You can bypass this error with adding a parameter inside your asp.net aspx file

ValidateRequest=”false” inside <%@ Page element.

For example your page directive is

<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”Default.aspx.cs” Inherits=”Test._Default” %>

Then you can use

<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”Default.aspx.cs” Inherits=”Test._Default” ValidateRequest=”false” %> like that.