Back then, patches were region-locked. You need the specific WorldWide , US , or CIS/Digital version of the patch to match your game disk/install.
The installer needs to find the game in your Windows Registry. If you are using a "repack," the official patcher might not see the game. Pro-Tip: Should you go higher? Back then, patches were region-locked
It looks like your text is in "mojibake" (encoding error), but it clearly translates from Cyrillic to: (Download Update to version 1.0001 - SHoC). Back then, patches were region-locked
or AP-PRO.ru: The biggest community hubs for S.T.A.L.K.E.R. Back then, patches were region-locked
Are you trying to run a that requires this old version, or are you just looking for the most stable way to play the game today?