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Urgent: Microsoft .NET errors from apps

Hi Experts -

Until 2 days ago I had a perfectly working XP Pro installation. Then I installed RealPlayer (required for a work project) and everything went down hill from there.

One of the errors is a .NET error where it can't find the following file:
C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorwks.dll

Thinking I would have to reinstall .net from the beginning, I tried re-installing .NET v2, but it complained I already had a later version of v2 installed. Then I tried installed .net v2sp2 and it said it was already installed so I would have to uninstall it.

I have .net 3.0 sp2 and .net 3.5 installed. Do I need to uninstall all of them down to v2.0 and then reinstall them all back up to 3.5 or maybe even 4.x?

Thanks!

John

To the extent that an application needs .NET Framework 1, 2, 3, or 4 then you need them all installed. I don't think I have .NET Framework V2 on my Windows 7 machine, so you can try living without it and adding V4 to what you have above.

If you want them all, then, yes, I would uninstall all and start again. .... Thinkpads_User

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It turned out that this seemingly simple question was actually the tip of an iceberg.

The information required to do justice to this question would require an answer that is much longer than the allowed space, and is more suitable to an article which I will try to write up in the next week or so.