My Lightroom has become extremely laggy

hello!

 

i have been using lightroom cc year , until week or has run smoothly.

 

now suddenly, it's laggy, when editing pictures, or browsing.
any1 got idea why?
i have 2 drives, main drive ssd has lightroom library, while on other drive have program installed.
i have got lot of space on other drive, on ssd full.
could problem?

 

also, if reinstall lightroom, edits , such removed?
and, if reinstall entire compute, edited pictures stored? instance, virtual copies?

 

thanks!

ssd has lightroom library

does mean catalog file on ssd, or photo files, or both?

now suddenly, it's laggy, when editing pictures, or browsing.

can more specific? browsing in library module? browsing in develop module? specific editing steps worse others?

 

please state version number of lightroom. go help->system info. not state words "current" or "up-to-date".

 

please state resolution in pixels (width , height) of monitor.

 

reinstalling not solve problem.

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