Windows 10 and Parallels 12 - Extremely slow, unuseable

Windows and all installed application are running very slow and laggy! It's near unusable! I have Parallels 13 on an iMac and I can't use my installed programs.
 
Pilling on. Been having the same problem and I am novice user running the latest version of parallel 13 update and MacOS 10.13.3
 
Still same issues with updated PD13 and Win10.

Team Parallels,
please help create a guide on how to get reasonable performance setup running a full-spec Macbook Pro or iMac.


(please no KB's or re-install parallels tools.. these are not the solutions)
 
It's depressing to find that the same problems persist in Parallels 13. Last year, after many years of running an old version of Parallels (with XP!), I was forced to upgrade in order to run the latest version of a windows application (i.e. the one app that forces me to use windows!). Everything used to run well on my Mac Pro (and I was able to use the hardware available). After "upgrading" to Parallels 12 and Windows 10, performance fell off a cliff. It's tough to quantify, but judging on startup times, it could be as bad as a 50 fold drop. The application is virtually unusable. The problem is compounded by Parallels now restricting memory and number of cores. I read the support pages and tweaked all the obvious settings. No improvement. The only change I have not made is upgrading my hardware with an SSD (I'm not inclined to do that as a speculative change). The bottom line is that I have completely lost confidence in Parallels and can't see wasting money on upgrading to version 13 as it sounds like these performance problems persist. Why has this become so hard? For years it was a good solution. I just want it to work and it doesn't seem like it does with later versions. I may give Fusion a shot, but I'm becoming inclined towards buying a dedicated Windows box, or seeing if I can run Windows under boot camp on my previous Mac Pro. I'm interested to hear what others are doing, since it doesn't seem like Parallels is offering concrete solutions. Obviously some people are getting acceptable performance; so why is it that some of us aren't?
 
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