Troubleshooting
- Resolving Basic Browser Issues
- Browser Support Policy
- Installing Bookshelf on Android Devices (without Google Play)
- Bookshelf Support for macOS, iOS, and iPad OS betas
- You have Reached your Machine Activation Limit
- Why have I not received my Email Verification email?
- The Videos Will Not Play in My eTextBook(s)
- What to do if you are missing an eBook
- Configuring Your Firewall For Use With VitalSource
- My book is reading in a different language or with a strange accent and not English.
- View All Articles
About Machine Activation Limits
VitalSource Bookshelf allows for two computers and mobile devices activated at any given one time on your account. If you are activating a new computer or mobile device, and receive the error message: "You have Reached your Machine Activation Limit" you will need to deauthorize an older computer or mobile device in order to activate a new one.
Managing Machine Activation Limits
Device-specific instructions for managing activations are below if you do not know what platform you are on choose Managing your activations from a browser:
- Managing your activations from a browser
- Managing your activations from Bookshelf Desktop
- Managing your activations from Bookshelf for iPad, iPhone, or iPod Touch
- Managing your activations from Bookshelf for Android or Kindle Fire
Managing your activations from a browser:
- Go to the VitalSource Account Center
and sign in with your username and password. - In navigation bar, click on Devices
- Find the device you wish to disable and click on the Deactivate button
- Sign into Bookshelf with your login credentials
Managing your activations from Bookshelf Desktop:
- After receiving the Activation Error message in Bookshelf, click on the Help Me resolve this error link
- Bookshelf will sign you into the VitalSource Account Center (requires Bookshelf 7.0 Mac and 7.2 Windows)
- In navigation bar, click on Devices
- Find the device you wish to disable and click on the Deactivate button
- Click on the Back to Application button
- Sign into Bookshelf with your login credentials
Managing your activations from Bookshelf for iPad, iPhone, or iPod Touch:
- After receiving the Activation Error message in Bookshelf, tap on Ok in the dialog box
- Bookshelf will open a pop-up and sign you into the VitalSource Account Center
- In navigation bar, click on Devices
- Find the device you wish to disable and click on the Deactivate button
- Click on the X button in the top left of the screen to return to Bookshelf and sign-in
Managing your activations from Bookshelf for Android/Kindle Fire:
- After receiving the Activation Error message in Bookshelf, Tap on the Help button
- A new browser window will open, and Bookshelf will sign you into the VitalSource Account Center
- In navigation bar, click on Devices
- Find the device you wish to disable and click on the Deactivate button
- Toggle back to Bookshelf
- Tap the Close button to sign into Bookshelf