RStudio can't launch in 64 bits => R session process exited with code -1073740791

Hello,

I've been searching this past weeks on the web a solution for an issue that 'I'm facing, but never found out a fix.
So, if anyone can help, I'll be glad.

Since a few weeks, I'm unable to launch RStudio with R 64 bits. Launching it with 32 bits version seems fine.

My specs :
I am running Windows 10 64-bit 10 Family edition, Version 21H1, Build 19043.1052, Windows Feature Experience Pack 120.2212.2020.0
RStudio 1.4.1725
R 4.1.0
I cannot get sessionInfo() in 64 bits, but in 32 bits it gives :

R version 4.1.0 (2021-05-18)
Platform: i386-w64-mingw32/i386 (32-bit)
Running under: Windows 10 x64 (build 19043)

Matrix products: default

locale:
[1] LC_COLLATE=French_France.1252  LC_CTYPE=French_France.1252    LC_MONETARY=French_France.1252
[4] LC_NUMERIC=C                   LC_TIME=French_France.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_4.1.0 tools_4.1.0   

The log for the problem report :

## R Session Startup Failure Report

### RStudio Version

RStudio 1.4.1725, "Trampled Dandelion" (e738b1cc, 2021-06-29) for Windows

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) QtWebEngine/5.12.8 Chrome/69.0.3497.128 Safari/537.36

### Error message

[No error available]

### Process Output

The R session exited with code -1073740791. 

Error output:


[No errors emitted]


Standard output:


[No output emitted]


### Logs

*C:/Users/fly_r/AppData/Local/RStudio/log/rsession-fly_r.log*


01 Jul 2021 01:46:44 [rsession-fly_r] ERROR system error 10053 (Une connexion �tablie a �t� abandonn�e par un logiciel de votre ordinateur h�te) [request-uri: /events/get_events]; OCCURRED AT void __thiscall rstudio::session::HttpConnectionImpl<class rstudio_boost::asio::ip::tcp>::sendResponse(const class rstudio::core::http::Response &) src/cpp/session/http/SessionWin32HttpConnectionListener.cpp:113; LOGGED FROM: void __thiscall rstudio::session::HttpConnectionImpl<class rstudio_boost::asio::ip::tcp>::sendResponse(const class rstudio::core::http::Response &) src/cpp/session/http/SessionWin32HttpConnectionListener.cpp:118
01 Jul 2021 01:50:11 [rsession-fly_r] ERROR system error 10053 (Une connexion �tablie a �t� abandonn�e par un logiciel de votre ordinateur h�te) [request-uri: /events/get_events]; OCCURRED AT void __thiscall rstudio::session::HttpConnectionImpl<class rstudio_boost::asio::ip::tcp>::sendResponse(const class rstudio::core::http::Response &) src/cpp/session/http/SessionWin32HttpConnectionListener.cpp:113; LOGGED FROM: void __thiscall rstudio::session::HttpConnectionImpl<class rstudio_boost::asio::ip::tcp>::sendResponse(const class rstudio::core::http::Response &) src/cpp/session/http/SessionWin32HttpConnectionListener.cpp:118

The only sentence in french can be translated like this :

An established connection was aborted by the software in your host machine

Due to these words in particular, I've been checking in windows firewall settings : R and Rstudio are given rules to pass through it. I tested deactivating avira firewall too, without success. I've been updating all my drivers to last versions since, no changes.

I tested to work in 32 bits only, but some packages that I use seems only 64 bits compatible (yeah, I was surprised too).

By advance, thanks to all the community :wink:

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