The most recent Parallels 9 update really played havoc (crashes, freezing) with a major piece of older software that we still need. Running XP Pro on a MacBookPro 2010, 10.9. Software is OHM (Occupational Health Manager for Windows from UL). Went back to build 9.0.23136.932290 and am happy again. Other Windows programs did not have any problems. Just a FYI for anyone else still running this combination.
DocT
DocT