Get Rid of not solving envrimn

I 've this problem already, and no answer.
Is there any solution?

If I install some package, or as actually

*conda uninstall spyder --debug

I get no answer, but many times:

DEBUG conda.resolve:filter_group(632): python: pruned from 441 → 64
DEBUG conda.resolve:filter_group(632): pip: pruned from 283 → 101

DEBUG conda.common._logic:_run_sat(600): Invoking SAT with clause count: 98488
DEBUG conda.common._logic:_run_sat(600): Invoking SAT with clause count: 433422
DEBUG conda.common._logic:_run_sat(600): Invoking SAT with clause count: 272274

Unfortunately this is Anaconda 2019 on Win7. I’m not allowed to change the system.

What can I do, if this last hours?

(base) C:\Users\fertlab\Anaconda3>conda install spyder
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata
source.
Collecting package metadata (repodata.json): done
Solving environment: -