Symptoms
- Installer closes with an error partway through
- 'Access denied' or 'insufficient permissions' message
- Installer hangs at a specific percentage
- App installs but won't open afterward
Likely causes
- CommonNot enough free disk spaceInstallers need room for temporary files as well as the final program.
- CommonInstaller not run as administratorMany programs need elevated permission to write to system folders.
- CommonAntivirus blocking the installerSecurity software can flag legitimate installers as suspicious.
- PossibleCorrupted or incomplete installer downloadAn interrupted download leaves a broken installer file.
- PossibleIncompatible operating system versionSome software requires a minimum OS version to install.
What to do
- Check you have enough free disk space for the install, generally a few gigabytes to be safe.
- Right-click the installer and choose 'Run as administrator' (Windows) or confirm you're an admin user (Mac).
- Temporarily disable antivirus real-time protection and try again, re-enabling it right after.
- Delete the installer and re-download it fresh from the official source.
- Restart your computer and try installing again.
- Check the software's minimum system requirements against your operating system version.
When to call a pro
Only download installers from the official publisher's website to avoid malware.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.