It show that:
user data error 212
lease use KeyTool.exe to enter the correct data.
Go to HKLM_Softwar_CM&V and delete the key
2-Go to C:\Program Files\Common Files\ and delete the "DVBViewer Shared" folder
3-Go to C:\ProgramData\ and delete the "CMUV" folder
4-Go to C:\Program Files\ and delete the "DVBViewer" Folder
5-Before installing disable internet connection
6-Now install the new DVBViewer 5.0