
Thank you for contacting RealNetworks Support regarding the inability to play videos because RealPlayer stopped working.
As you know, this issue was related to a recent Windows 10 update.
We're happy to let you know that Microsoft announced a new update on March 20 (KB4015438) that corrects this issue. This update can be downloaded and installed from Windows Update. For more information, visit:
https://support.microsoft.com/de-de/help/4015438/windows-10-update-kb4015438
Please let us know if you continue to experience any issues with playing your videos after installing this Windows Update.
Thank you for using RealPlayer!