Please let us know when this works, as per the channel9 video when the VS install directory is not drive C. (Boot [C] is a relatively small SSD, installs are in D, data is in E)
Mads, this looks like it would be great if it would work for me, but I've already spent a bunch of time dealing with the 'SP1 is required' issue, then seeing people reviewing about the problems with a typical, but apparently non-standard, installation location.
Since the video and hype is great, but the installation and usage has such issues, I've voted 3. It isn't crap or vaporware  and it isn't gold  (at least for me, get the installs fixed, then maybe).
Unfortunately, I had to uninstall this. After installing I could no longer edit CSS files in Visual Studio getting the same "unspecified error" that others are mentioning. Once I uninstalled, I could edit CSS files again.
Do NOT use this. After installing it, Visual Studio lost all ability to recognize CSS files, let alone have intellisense function. Uninstalling and trying to fix Visual Studio was a nightmare. Bad, bad, BAD extension.
Very useful tool. I used it for two days, then happened an windows update, and the VS2010 instead of opening the css file, said:"Operation could not be completed". I obviously thought , because of the extension. There is a (new) option: Reinstall, ad after it I can use it again. I think, If it would have been happened some month later, when I not remember the extension, it would have been hard to figure out, what is the problem, because on first look I didn't find anything in the event log.
I cannot install this msi. 100% of the time gets error that it cannot read from source:
The file '_0F782C482DDA47E9ABF16884D1369F94' cannot be installed because the file cannot be found in cabinet file '_80D683DD59333E5CC8E528639A9A7F06'. This could indicate a network error, an error reading from the CD-ROM, or a problem with this package.
Please fix ASAP! These is no real HTML5 support in VS2010 without this!
My understanding is it's because this is an unofficial project. From the extension description: "Note: This extension is created by a bunch of folks within Microsoft in their spare time. This is NOT an official Microsoft product."
When I click the MSI setup file, it pops up a dialog message as follows,
Web Standards Update for Visual Studio 2010 SP1
Service Pack 1 for Visual Studio 2010 must be installed. Do you want to download it now?
Unfortunately, I've installed SP1 for VS2010 already.
The following text are in my Visual Studio 2010 About dialog.
Microsoft Visual Studio 2010
Version 10.0.40219.1 SP1Rel
Microsoft .NET Framework
Version 4.0.30319 SP1Rel
Installed Version: Ultimate
Microsoft Office Developer Tools 01019-532-2002102-70101
Microsoft Office Developer Tools
Microsoft Visual Studio 2010 Ultimate - ENU Service Pack 1 (KB983509) KB983509
This service pack is for Microsoft Visual Studio 2010 Ultimate - ENU.
If you later install a more recent service pack, this service pack will be uninstalled automatically.
For more information, visit http://support.microsoft.com/kb/983509.
Windows Azure Tools Version 1.3
Windows Azure Tools for Microsoft Visual Studio 2010 v1.3.31122.1601
I have the same problem as SeongTae Jeong on one machine, although it works on another. Re-installing Service Pack 1 has no effect. The machine with the issue does not have IIS installed, but that's the only significant difference I can think of between the two machine.
I am having the same issue. When I try to install, the dialog says, "Service Pack 1 for Visual Studio 2010 must be installed. Do you want to download it now?" I already had SP1 installed. I tried re-installing it and received the same message.
I have the same problem. I noticed, however, that the download link goes to a page where the Web Platform Installer is launched. Maybe the Web Standards Update only works if VS2010 SP1 has been installed via WebPI? My WebPI also shows the SP1 update as "available". Too bad that I installed SP1 right after the release, before it showed up in WebPI. :-(
I now did reinstall VS2010 with Web Platform Installer (using the link the Web Standards Update installer pointed me to). It installed 12 packages overall and took an hour - but then I could install the Web Standards Update. Maybe this helps others, too.
The cause isn't the Web PI. I have VS 2010 + SP1 and installed SP 1 with the standard download for it and no issue here installing it.
Had issues with other addin's around the VS SDK, so if you had that installed previously maybe make sure that is also at SP1 (it's a seperate install)
If you have trouble installing it because it requires you to have SP1 installed while it already is you could do the following:
Get the ORCA tool from Microsoft (http://msdn.microsoft.com/en-us/library/aa370557(v=VS.85).aspx) this is a MSI editor.
Once you have it, start it and Open the downloaded "Web Standards Update.msi" package.
In the Tables, select the "CustomAction" entry,
Once selected, in the right pane, select the "VSDCA_VsdLaunchConditions" line, right-click and select "Drop Row".
Then Save the package and run it.
Same problem here. Windows 7, 64bit.
@Wouter vanEck: Installing the ORCA tool is only available for Windows SDK Components for Windows Installer Developers (a 2.5 GB download, 4.5 GB installation). I'll wait for a different solution...
I'm glad there exists a workaround to the problem, but like the others said, installing a 2.5GB SDK to modify the MSI doesn't seems reasonable. Maybe someone with the SDK installed already can do the mod and post the MSI on the DL?
I had the same problem. I've used "InstEd It!" (http://www.instedit.com/home.html, 5.6MB) rather than Orca to edit the MSI following Wouter's directions and I've been able to install the MSI properly after that.
Did the Wouter fix via instEdit to work around the SP1 is not installed bug. Got the "Operation could not be completed" bug when attempting to open any css file. My installed folder is not on C:\ OS drive, so copied the contents of C:\Program Files\Microsoft Visual Studio 10.0\Common7\Packages to the Packages folder in my installed folder, ovewriting any existing files, which resolved the issue. Seems to work but cannot say if this is valid!
Had installed CSS 3 intellisense (http://visualstudiogallery.msdn.microsoft.com/7211bcac-091b-4a32-be2d-e797be0db210), later installed VS SP1 and started getting the "Operation could not be completed" bug.
Uninstalled CSS3 Intellisense, tried to install this package but ran into the "Service Pack 1 for Visual Studio 2010 must be installed" problem, worked around it with Wouter's directions via instEdit and now I can edit CSSs again uff...
For HTML, under Tools->Options->Text Editor->HTML->Validation, we can choose "Target" to be "HTML5".
Unfortunately, there seems to be no such setting for CSS. How do I tell VS.NET to default to CSS3 for CSS files?
or see -> Toolbars -> style sheet and change the CSSX.X for CSS3.0 and ready.
Revisa en http://www.hanselman.com/blog/AnnouncingTheWebStandardsUpdateHTML5SupportForTheVisualStudio2010Editor.aspx
o ver -> barra de herramientas -> hoja de estilos y cambia el CSSX.X por CSS3.0 y listo.