As a follow-up, since I’ve followed Georg’s method to roll back the graphics driver about 4 weeks ago, I have had no problems with crashing/freezing. The graphics freeze I used to get at 38 min which would typically lock up the game now regularly occurs at 34 minutes, but is no more than a momentary hitch, and I’m able to continue my rides. I suggest those of you experiencing this problem give the driver change a chance.
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Just out of curiosity: do you have the auto-screenshot feature enabled? Because this also causes short hickups for me mid-ride when it is taking the snapshot.
I bought a new PC (Intel(R) Core™ i7-1065G7 CPU @ 1.30GHz (8 CPUs), ~1.5GHz) based on Zwift guidelines, just to have ALL my rides freeze mid-ride or crash completely.
Raised a ticket with Zwift, they gave several “solutions”, I did all of that and finally they came back stating “There is a crashing issue with some specific i7 10th generation Intel processors” and then subsequently I enquired about timelines for them fixing this issue, the response was “thanks to the complexities of software development, it’s hard to say exactly when this will be resolved i’m afraid”
This is getting beyond the point of frustrating and with no solution in sight, I might just ask for a refund too
Thats exactly the CPU I have in my Surface, so the driver downgrade I suggested above should most likely fix it for you as well. Not solving the problem but working around it just in case you want to stick with ZWIFT despite these issues…
Thank you Georg, I will try that for sure. It is just frustrating that there is no urgency from Zwift’s side to try and assist.
If the crashes are hard to fix, maybe they could work on letting riders reconnect after a crash…
When I copy the url you posted I get a 404 error message that it might have been removed so I’m wondering if this might no longer be an option. I am still within the return period of my Surface Pro 7 and getting the same issue…is there any rig I could get that would not have this problem, e.g. any chip other than that Intel one?
Well, if you specifically bought the Surface for ZWIFT then you probably really want to return it. In any case, the old link seems to be down indeed - I just found this
https://fichiers.touslesdrivers.com/63458/SurfacePro7_Win10_18362_19.103.34215.0.msi
Note: untested and unchecked for unwanted software from my side!
EDIT: I compared the sha256 checksums for the GraphicsBase folder of the version I d/led from Microsoft and this one and they are the same…
Just tested 27.20.100.9466 (14.05.2021) - still crashes minutes into the game, so back to the old drivers.
Do you know if Zwift is able to give some kind of feedback or timeline on the fixes? I saw last night that there are plenty of riders struggling with windows crashing. But it seems there is still no urgency from Zwifts side to rectify
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Well, I somehow doubt that ZWIFT will actually fix it at all. I think that - assuming it really is a specific driver issue - all that they do is push it upstram to Intel and close tickets on it as “won’t fix” as indicated by their reply posted earlier in this thread. And at Intel I don’t know how high a priority this issue gets.
I mean, they include indeed fixes for specific issues with specific AAA games into the drivers, but I don’t know which ranking some subset of ZWIFT users using this specific chip version will have on their scale.
Hard to tell without knowing which change to the drivers triggers the crash. I thought about pinpointing the exact version that introduced the crashes and then compare the list of changes to get an idea - but honestly: I rather spend the time I have cycling than debugging this for them 
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Hi Georg - have just had a read through and saw you’ve had success with a downgrade of the graphics driver. Just wondering how you’ve fared now it’s been some time since you downgraded?
All I can say: no issues anymore since I use the old driver - I did not see a single crash since the downgrade.
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Just to help others I’m going to detail my journey fighting Zwift crashes. Same problem as many other posters, when looking at my log in event viewer around the time of the crash I see the message “Display driver igfxn stopped responding and has successfully recovered.” As with other posters my laptop has integrated graphics, for the record its a Dell XPS 7390 16GB i7-1065G7 (10th gen) - about a year old and a fairly well specced PC. When I started using Zwift about 2 weeks ago my gfx driver was dated Sep 2020. As advised by Zwift support I upgraded to the latest driver (May 2021) but still had crashes. Today I installed the oldest Intel Iris plus driver I could find on the Intel site (Mar 2020 - 26.20.100.7985) - this date precedes the emergence of the graphics driver issues raised in this thread. Did a 3.5hr ride today without issue. Have everything crossed! Will provide updates! Did try installing the drivers that Georg mentioned previously - was warned by Windows they were not verified for my system but forced them on anyway and end up with a black screen - had to jump through some hoops to recover things - lesson learnt!
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For anyone wanting to try out some old PC gfx drivers this site may be useful…
driversol. com/drivers/video-cards/intel/intelr-uhd-graphics
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I just tried downgrading to the 26.20.100 driver (had to use the zip file), but testing with “just watch” Zwift still locked up!
The previous version of Zwift only locked up in France and New York. This version is freezing a lot more often!
hello
i have also been crashing for the last few months .
i have been told , its because my graphics card is too advanced for zwift ? zwift says they know about it , cant do anything yet?!
zwift freezes and becomes non responsive 20 to 30 min into work out .
The update before this last one , was perfect
mondays update through it all backwards again
it just makes no sense
pls can some one help … i am pulling my hair out ,
i have same issue , and response .
am beside my self with frustration
That’s a new one. 
Beyond putting up with the crashes, the only solution is to run the game on another device.
An update re my last reported downgrade to 26.20.100.7985 - 5 days of riding, 300kms without a crash. Not getting my hopes up too much just yet - did have similar crash free periods with more recent drivers. And as Dave said and as per advice from Zwift, you may need to try using other non PC devices to reduce crashes.