It is important that you follow these steps in order (including restarting your computer) to make sure the cache clearing happens and that the new installation is completely fresh.
Uninstall Magic Online
- Press Windows key + R or go to Start -> Run (or Search -> Run, then Click Run in Windows 8)
- In the box, type: control appwiz.cpl
- Click “OK”
- This will pull up a list of installed programs. Scroll down to the “M”s and you should see one or more programs that start with “Magic the Gathering Online." It should look similar to this:
- Right click the “Magic the Gathering Online” version and then select “Uninstall/Change” and follow the prompts.
- Repeat this process until all of the Magic Online programs have been uninstalled.
Clear the ClickOnce Cache
- Press Windows Key + R or go to Start -> Run (Search -> Run, then Click Run in Windows 8)
- In the box, type: rundll32 dfshim CleanOnlineAppCache
- Then click “OK” (if prompted)
Restart your Computer
Restart your computer and install the client from the link below: http://magic.wizards.com/en/content/download
If That Doesn't Work, Try These Steps
If you are still having issues with Magic Online, continue with the following steps:
- Uninstall Magic Online
- Press Windows key + R
- Type %LocalAppData%\Apps
- Delete the 2.0 folder
- Download and install the client from this link: http://magic.wizards.com/en/content/download