Revised Answer (April 2018)
Chrome ended support for Vista in April 2016 (see
Google Chrome Blog: Updates to Chrome platform support), meaning that no version more recent than Chrome 49 could be used on Vista. (At the time of revision, the current version is Chrome 66 and rising.) It would be irresponsible of me not to point out that
nobody recommends using an outdated browser. In my original reply, I recommended Firefox or Pale Moon because those browsers still supported Vista; but the day is rapidly approaching when
no browser will support Vista (see
Update on Firefox support for Windows XP and Vista – Future Releases and
Basilisk and Windows Vista - Pale Moon forum). If you are using an old Vista PC primarily for browsing the internet, then an inexpensive Chromebook might be a suitable replacement.
Then again, this is
Vista Forums, so I will attempt to answer your question. The very last version that supported Vista was
Chrome 49.0.2623.112, and download links can still be found, at least for the 32-bit version. For example, at
Google Chrome 49.0.2623.112 Stable - Webroot Community the 32-bit link still works at this time, but the 64-bit link returns a 404 error at Google. (Forum rule no. 11 prevents me from posting a direct download link
here.) For 64 bit, I don't have a better suggestion than the final reply at
Google Groups, which involves a third party and a slightly earlier version of Chrome 49.
How do I update Flash Player in Chrome?
That is a very good question. There is no simple way, because this is something that Google takes care of (unless you're running an outdated version of Chrome on an unsupported operating system like Vista). Computer-savvy Chrome users running Vista might be a contradiction in terms; but if they exist, the "Correct Answer" at
How to Install Flash in Vista w/ Chrome Browser?? | Adobe Community looks very promising.