删除以下文件：
C:\Program Files (x86)\Devart\UniDAC for Delphi 7\Bin\unidacvcl70.bpl
D:\Program Files (x86)\Borland\Delphi7\Bin\unidacvcl70.bpl
C:\Program Files (x86)\Devart\UniDAC for Delphi 7\Bin\dclunidac70.bpl
D:\Program Files (x86)\Borland\Delphi7\Bin\unidacvcl70.bpl
D:\Program Files (x86)\Borland\Delphi7\Bin\dclunidac70.bpl
C:\Program Files (x86)\Devart\UniDAC for Delphi 7\Bin\dacvcl70.bpl
D:\Program Files (x86)\Borland\Delphi7\Bin\dacvcl70.bpl
C:\Program Files (x86)\Devart\UniDAC for Delphi 7\Bin\dcldac70.bpl
D:\Program Files (x86)\Borland\Delphi7\Bin\dcldac70.bpl
C:\Program Files (x86)\Devart\UniDAC for Delphi 7\Bin\dclcrcontrols70.bpl
D:\Program Files (x86)\Borland\Delphi7\Bin\dclcrcontrols70.bpl
原文：https://www.cnblogs.com/windel/p/10107920.html