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I using Delphi 7. Until recently, it worked fine. But now, every time i do right click, I get an error that message is

"Access violation at address 735f5e37 in module 'MSVCR90.dll'. Write of address 00000000"

So, I can not do anything in delphi7 IDE for development.

Also, When I left click at menu (such as file, edit, run, tool.. etc) occur same error message.

So, I reinstall delphi7. But same occurs these error message.

Why is this happening?

InKwon Devik Kim
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  • Googling "right click error in 'MSVCR90.dll'" finds a number of sites encouraging you to download their tools to fix it, but probably they want you to install their malware. How recently have you done a full anti-malware scan of your system? Also, which OS? – MartynA Feb 16 '17 at 12:02
  • Not very related but you should consider something new (like delphi XE) since your 7 is a bit outdated nowadays – Alberto Miola Feb 16 '17 at 12:43
  • @AlbertoMiola: On the other hand, D7's IDE is noticeably faster than and, ime, far more stable than any more recent version of Delphi. – MartynA Feb 16 '17 at 12:50
  • I doubt Delphi7 needs MSVCR90.dll at all. Sounds more like either your MSVCR90.dll or your system is corrupt for other reasons. – AmigoJack Feb 16 '17 at 13:07
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    This is most likely due to a misbehaving third-party component/wizard/extension you've installed, which will not be removed with a simple reinstall of the IDE. See [this answer](http://stackoverflow.com/a/13860652/62576) for a way to see if this is the problem or not and if it is how to fix it. – Ken White Feb 16 '17 at 13:29

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