Installation 2.5.7 doesn't show 2.5.8 as update - Joomla! Forum - community, help and support

in update manager joomla 2.5.7 install doesn't show there being update available, though 2.5.8 available.
is ther can show available?

[mod note: moved admin forum update forum;]
to you, in future, find correct forum topic please read which forum post question have put together.

rather use update patch or in addition if completed appear installation/upgrade process not completed correctly or in way corrupted, should/can reinstall full package rectify omissions.

1. backup site
   in unfortunate event have not done so, backup site , database now.
2. reinstall joomla_2.5.8-full-stable_package.zip
   1. download copy of joomla_2.5.8-full-stable_package.zip
   2. go extensions ⇒ extension manager ⇒ install tab
   3. in upload package file panel
      1. browse downloaded file.
      2. click upload , install.
3. final steps
   1. go extensions ⇒ extension manager ⇒ discover tab
      
      1. click discover
         • this show new extensions available
         • it show old, deprecated one's, particularly if site updated 1.6.x, aware.
      2. select new extensions only
      3. click install.
   2. go extensions ⇒ extension manager ⇒ database tab.
      • click fix
   3. go extensions ⇒ extension manager ⇒ discover tab
      • click purge cache
   4. now check out site , features both existing , new make sure working.
4. backup site
   once checks completed (and assuming alright now) must ensure have clean copy, @ point in time, of site , database part of overall backup plan should have in place site. so run fresh of site , database.

doing ensure site entirely date. if still not work there may issues notifications being sought external sites on particular web host , should speak them it.

if none of helps, please run forum post assistant provide information try , resolve issue.
please follow instructions in post , program pack closely.