{"id":41605,"date":"2019-03-01T13:50:11","date_gmt":"2019-03-01T19:50:11","guid":{"rendered":"https:\/\/resource-center.hrblock.com\/?post_type=support&p=41605"},"modified":"2019-03-01T13:50:11","modified_gmt":"2019-03-01T19:50:11","slug":"error-1721","status":"publish","type":"support","link":"https:\/\/hrbcomlnp.hrblock.com\/tax-center\/support\/software\/technical-issues-software\/error-1721\/","title":{"rendered":"How Can I Fix Error 1721 When Installing My Tax Software?"},"content":{"rendered":"

When you\u2019re trying to install your H&R Block software<\/a>, you might see H&R Block error 1721. If this error is showing up for you, you’ll need to unregister and re-register your Windows Installer Service.<\/p>\n

To fix H&R Block error 1721 by unregistering and re-registering your Windows Installer Service:<\/p>\n

    \n
  1. Press the Windows Key + R\u00a0<\/strong>on the keyboard.<\/li>\n
  2. In the Open\u00a0<\/strong>box, type this exactly as shown with the space before the slash:
    \nmsiexec \/unregister<\/li>\n
  3. Once you\u2019re sure that you\u2019ve typed it in correctly, click OK<\/strong>. If the command you\u2019ve entered has worked, you won’t see a notification.<\/li>\n
  4. Click Start<\/strong>, then choose Run<\/strong>.<\/li>\n
  5. In the Open\u00a0<\/strong>box, type this exactly as shown with the space before the slash:
    \nmsiexec \/unregister<\/li>\n
  6. After ensuring that you\u2019ve typed the command in correctly, click OK<\/strong>. If the command works, you won’t see a notification.<\/li>\n
  7. Restart your computer, and then try installing the product again.<\/li>\n<\/ol>\n

    With these steps done, H&R Block error 1721 should be fully resolved.<\/p>\n

    Additional Help for Fixing Error 1721<\/h2>\n

    If you’ve gone through these steps and this error 1721 fix still isn\u2019t working for you, contact an H&R Block support specialist for additional assistance. You can reach our specialists by calling 800-HRBLOCK\u00a0<\/b>(800-472-5625).<\/b><\/p>\n","protected":false},"excerpt":{"rendered":"

    When you\u2019re trying to install your H&R Block software, you might see H&R Block error 1721. If this error is showing up for you, you’ll need to unregister and re-register your Windows Installer Service. To fix H&R Block error 1721 by unregistering and re-registering your Windows Installer Service: Press the Windows Key + R\u00a0on the […]<\/p>\n","protected":false},"author":658,"featured_media":0,"menu_order":0,"template":"","topic":[16243,16246],"class_list":["post-41605","support","type-support","status-publish","hentry","topic-software","topic-technical-issues-software"],"acf":[],"yoast_head":"Error 1721 | H&R Block<\/title>\n<meta name=\"description\" content=\"Learn how to fix Error 1721 when installing H&R Block Tax Software. 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