Unable to reproduce this issue, we tested this issue on windows 10 machine with chrome version beta 55.0.2883.52. 
Observed that files are downloading correctly and when download completes OS crash not happened

Could you please try this scenario with clean profile without using any apps or extensions in your browser and let us know your observations.

Attached screen-cast for your reference

Deleted: Issue 667098.mp4 3.7 MB

	Issue 667098.mp4 3.7 MB View Download

alvinhochun@ can you please provide the link for the download which you are trying(If it's ok to share) to reproduce the issue. 

iirc one of these two files had freezed the OS:
https://dl.google.com/dl/android/aosp/bullhead-n5d91l-factory-7151a923.zip
https://dl.twrp.me/bullhead/twrp-3.0.2-2-bullhead.img

I can't really just test again on a real machine as I have work to do and it would be really bad if I ended up corrupting my drives (I already had to spend a whole day running chkdsk on my external HDD.)

I might set up a VM to test, but it will take some time.

Just in case it matters, I am running the 64-bit build of Chrome beta.

Unable to reproduce this issue, we tested this issue on windows 10 machine with chrome version beta 55.0.2883.52. 

Downloaded the files from 2 mentioned websites and no OS crash observed.

Please look into the attached screen-cast for your reference and let us know your observations

Deleted: Issue 667098 - 1.mp4 7.3 MB

	Issue 667098 - 1.mp4 7.3 MB View Download

After some testing it seem to be related to the "real-time protection" of Microsoft Security Essentials (it is the Windows 7 equivalent of Windows Defender post-Windows-7.) If I switch off the "real-time protection" I don't get any freezes.

I don't use and don't have any other antivirus software, so it is certainly not a conflict between antivirus software.

alvinhochun@ as this issue is seems to resolved from your end as per comment #6, can we close this issue?

Uh, no, I only found out that disabling "real-time protection" makes the freeze disappear, but it doesn't give any conclusions. I didn't have this issue before, so it could be either a regression of Chrome or a regression of MSE, or it could be something specific to my system.

I don't consider disabling "real-time protection" to be a solution, unless there is prove that MSE screwed up in some way.

I guess whatever you can close this as not reproducible or something. I'll just take it that MSE screwed up.

As per comment #9 closing this issue, Please raise new issue if you come across the similar one on chrome latest versions.

Thanks!

Well, I do still get it but I don't see what I can do unless someone else can reproduce it on their setup.

I am having teh same issue
Windows 7 Chrome 55.0.2883.87
Turning off MSE works, 
Same File downloads fine with no freeze in Internet explorer.

Hi, this happens to me. I can reproduce using the latest Chrome (as of 2017-07-30), using Windows 7 and enabling Microsoft Security Essentials real-time scanning.

Hello, this occurs for me, also with Windows 7 and Microsoft Security Essentials. I'd provide the chrome build if my workstation weren't locked up for the next 15 minutes. Current build as of 05/23/18. Unsure if this is an issue with Chrome or MSE.