I installed lightroom classic but the application does not open, I already uninstalled and installed it again and it did not work, catalog update appears and the entire computer crashes
that sounds horrible. Possible, that your setup is too weak for LR? Do other applications run properly? (Photoshop / Premiere)
yes they all work great except lightroom classic
I think - i remember that there was
A) a KEyboard shortcut to start LR in resetted Mode
B) there was a Fixing tool some years ago - no idea if this is still existing
Have you already tried resetting Lightroom preferences?
This link has some information that may be useful on how to proceed. Despite not directly affecting the catalog or the presets, I recommend having a backup of these and of course your original photographs before any procedure for security reasons.
I tried, it didn't work
Have you tried logging into your Windows computer using a different user account, typically the Admin account, and seeing if LrC will open? If this diagnostic test works, the a problem in the user account you normally use may be the issue.
Is so, see:
Having similar issues, I have tried all the fixes mentioned. Support has had access to my system 3 seperate times and spent 2+ hours each time. Moving to a different account worked for a few days, it was painful as I had to rebuild parts of my catalog and now I am back to same issue and will not open. Adobe needs to start commenting on this issue.
A specific CACHE file may be at fault: