Microsoft has made available the微软已经提供了 Windows 7 RC视窗7钢筋混凝土 and is now available for public download from Microsoft servers. ，现在可以从微软的服务器公共下载 。 You can now try the Windows 7 pre-release software and you can see the changes and fixes from the Beta testing.现在，您可以尝试在Windows 7预发行版软件，你可以看到的变化，从Beta测试补丁。 Unlike the beta version, the Release candidate will be available till July 2009 and there is no limit to the product keys, so you have enough time to download the RC.不同的是测试版，发行候选人将于2009年7月为止，没有对产品密钥的限制，所以你有足够的时间下载的RC。
Some things to know about the RC:有些事情了解的RC：
This is pre-release software, so please read the following to get an idea of the risks and key things you need to know before you try the RC.这是预发行版软件，因此请阅读以下以获得的风险，你需要知道你尝试之前的RC关键的事情的想法。
- The RC will be available at least through July 2009 and we're not limiting the number of product keys, so you have plenty of time.区局可至少在2009年7月和我们不限制数量的产品密钥，所以你有充足的时间。
- The RC will expire on June 1, 2010 .区局将于6月1日，2010。 Starting on March 1, 2010 , your PC will begin shutting down every two hours.于2010年3月1日起，您的PC将开始关闭每两小时。 Windows will notify you two weeks before the bi-hourly shutdowns start. Windows将通知您前两个星期的双向小时的关闭开始。 To avoid interruption, you'll need to install a non-expired version of Windows before March 1, 2010 .为了避免中断，您需要安装一个未过期前2010年3月1日的Windows版本。
- Be sure to back up your data and please don't test the RC on your primary home or business PC.一定要备份您的数据和测试，请不要在您的主家庭或企业电脑的钢筋混凝土。
- Before installing the RC, please read the在安装钢筋，请阅读 Release Notes发行说明 and和 Things to Know了解的事项 for important information about the release.有关版本的重要信息。
- Be sure to turn on automatic updates in Windows Update in case we publish updates for the RC.一定要在Windows Update上自动更新打开的情况下，我们公布的RC更新。
- You can install the Windows 7 RC on a PC running Windows Vista without backing up the PC—but we encourage you to make a backup for safe keeping.您可以安装在运行没有备份PC上的Windows Vista电脑的Windows 7局，但我们鼓励您进行保管备份。 If you're running Windows XP or the Windows 7 Beta, you'll need to backup your data, then do a clean installation of the RC, then reinstall your applications and restore your data.如果您正在运行Windows XP或Windows 7测试版，您需要备份你的数据，然后做一个钢筋混凝土的全新安装，然后重新安装您的应用程序和恢复您的数据。
You can check out the您可以检查出 minimum system requirements最低系统要求 to install the Windows 7 RC.安装Windows 7局。 RC is available in 32 bit and 64 bit versions.区局可在32位和64位版本。
I'm really getting tired of Windows Vista, so I want to try this out, but it is my main computer.我真的累了的Windows Vista，所以我想尝试这件事，但它是我的主计算机。 I have too many files to back up effectively.我有太多文件备份有效。 Should I still go ahead and install the Windows 7 RC?仍要继续进行，并安装Windows 7钢筋混凝土？ How hard is it to re-install Vista, once this expires?有多难重新安装Vista，一旦过期？