On this page, you'll find typical problems with antiviruses and ways to solve them.
The add-in cannot load one of its dlls
After installation, on Excel startup, you may receive the following disturbing message:
First of all, check if you are using the freshest version of Ultimate Suite for Excel, which you can find on our Downloads page. Here is the guide on how to find the version number installed on your machine. If you've got an older version, install the latest one.
If after this the dll error persists, see below the reasons it may happen and several ways to solve it.
Turn off the Mandatory ASLR option
The cause of the problem may be in the enabled Mandatory ASLR option, as Ultimate Suite binaries are not compatible with Mandatory ASLR.
Click the Start button and type in Windows Security:
Click App & browser control:
Find Exploit protection and click Exploit protection settings:
In System settings, find the Force randomization for images (Mandatory ASLR):
Open the drop-down list and select Off by default:
Allow Excel creating child processes
Click the Start button and type in Windows Security:
Click App & browser control:
Find Exploit protection and click Exploit protection settings:
In Program Settings, click on excel.exe:
Click Edit:
Find the Do not allow child processes option and make sure to turn it Off. Do not forget to click the Apply button:
Turn off Potentially unwanted app blocking
Click the Start button and type in Windows Security:
Click App & browser control:
Find Reputation-based protection and click on Reputation-based protection settings:
Find the Potentially unwanted app blocking option and make sure to turn it Off:
Protection Error 253 with Trend Micro Antivirus
If you use the Trend Micro Antivirus, you may get the following error:
If you see this, add the Ultimate Suite installation folder to the antivirus exceptions:
Check your antivirus Quarantine
Despite the fact that our certificates are trusted, sometimes due to some reasons some antiviruses may block Ablebits. In such cases, you may get this message. Please go to Quarantine in your antivirus and restore all the Ablebits files you find there.
Disable the Preview pane in File Explorer
Besides, the cause of the problem may be the enabled Preview pane, so please disable it and try to install the add-in again.
Check your permissions
Also, you may not have the necessary permissions to run executable files from the installation folder. Consult your system administrator. If this doesn't help, please contact us at support@ablebits.com. We will do our best to help you solve the problem.
Check the AppLocker settings (if you use it)
If you use Windows 10 Enterprise or Education, the problem may occur because of AppLocker blocking the Ablebits installer. You can find it out if you go to Computer Management -> Event Viewer -> Applications and Services Logs -> Microsoft -> Windows -> AppLocker. If in the Number of Events column, you can see any number other then 0, this means that AppLocker is set to block some types of files (.exe, .msi, .dll, etc.). In this case, please consult your system administrator.
Here is a short guide on How to configure AppLocker to let the add-in work correctly.
Windows protected your PC
This is the message you may get after you have downloaded our product and are trying to install it:
Please don't be scared, everything is Okay. Simply click the More Info link, and you will see this:
And then, hit Run Anyway.
How to check that the certificate is valid
We publish our distributables in zip files. Please do not open a zip file directly in Windows Explorer. Instead, right-click it, and select Extract All... from the context menu. Then, switch to the Digital Signature tab of setup.exe Properties, select either signature, and click Details:
Now, click the View Certificate button:
And you will see the general information about the certificate:
On the Certification Path tab, select 4Bits Ltd. certificate:
And make sure that the cert is valid.
The certificate and antiviruses
Also, some antivirus software may not allow running our setup.exe (or msi) because our certificate is not familiar to them. If your antivirus has blocked our product, please contact our support service at support@ablebits.com and we will promptly help you.
Unable to start the 'AblebitsMakeDiffs.exe' application
If while using Compare Two Sheets, you get the Unable to start the 'AblebitsMakeDiffs.exe' application error message, please follow this guide: Configure Microsoft Defender or Windows Defender to use Compare Two Sheets