# Problems installing Opus

**URL:** https://resource.dopus.com/t/problems-installing-opus/11073
**Category:** Opus FAQs
**Created:** [May 29, 2011, 11:00pm UTC](https://resource.dopus.com/t/problems-installing-opus/11073 "2011-05-29T23:00:00Z")
**Posts on this page:** 1
**Showing post:** 1

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### Author: ![Jon](https://resource.dopus.com/user_avatar/resource.dopus.com/jon/32/12713_2.png) [@Jon](https://resource.dopus.com/u/Jon)
#### Post date: [May 29, 2011, 11:00pm UTC](https://resource.dopus.com/t/problems-installing-opus/11073/1 "2011-05-29T23:00:00Z")

</div>

(This has been hidden as most of it only applied to older installers. We have since switched away from InstallShield.)

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This FAQ lists several solutions for dealing with common installation issues.

**See also:** [Windows Compatibility Settings / Wrong DPI / Installer misdetects OS](https://resource.dopus.com/t/windows-compatibility-settings-installer-says-xp-sp3-is-required-on-a-later-os-version/11352)

**See also:** [How to manually remove Explorer Replacement settings](https://resource.dopus.com/t/how-to-manually-remove-explorer-replacement-settings/3646) if the installer fails and parts of Opus are now missing, with Explorer Replacement making it difficult to open a File Explorer window.

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Directory Opus uses the industry standard InstallShield installer. Despite InstallShield's ubiquity and $3000 price-tag, there are still sometimes problems and conflicts with it.

Below is a list of issues that people have encountered with the Directory Opus installer, and how to solve them.

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- **One possibility is that the installer was not downloaded completely.** See here:

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- **Try another Windows account (ServiceProvider.cpp error)**

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- **The installer gets stuck and stops making progress, typically around 70%.**

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- **While installing Opus, you get an error message similar to this:**

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- **After upgrading to a new _major_ version of Opus (e.g. Opus 9 to Opus 10), you get an error similar to this:**

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- **During the installation, you get an error similar to this:**

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- **Check your anti-virus software:**

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- **Do not use 3rd party "Uninstaller" tools or install monitors**

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- **Make sure Compatibility Mode is off**

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- **Check your TEMP folder location**

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- **Try deleting the existing folder**

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_[View the full topic](https://resource.dopus.com/t/problems-installing-opus/11073)._