"FIXED"

There are thousands of users having the same problems with the R5 update. So far, Quickbooks support can’t find the problem yet. After reading all of the issues that users were having, it pointed to where the Quickbooks R5 update switched from IE to Edge. Some say turning off the home page helped some. This got me thinking. Maybe the edge pop-up is blocking the URL that Quickbooks needs to access. So I went to Edge Pop Up Settings, which I usually have disabled in IE, but with these redirect viruses, I needed it on. I added "[*.]intuit.com" to the allow list without a quotation mark. So far, among my clients, no one has crashed within an hour. They have 43 company files that they switch back and forth. I'll keep it posted later today or tomorrow to be sure if this actually solves the problem on our end.

Updated:

As of now, I haven't heard anything from my client's problems yet. I'll know more tomorrow morning since they will be cutting a lot of checks. Also, make sure the default browser is set to Edge. If you have it under Chrome, you may need to find the settings to add it to the pop-up allow list and trusted sites. This may not be a fix for everyone, but I'm trying to find the problem since QuickBooks cannot figure out its own problems. I miss having full support through chat with engineers, and they usually solve problems. That was like 5 years ago. Nowadays, they're making you call someone to get level 2 who has no English, and it's harder for me to understand when I'm hearing impaired and still can't figure out their own problems. If I hear something from my clients tomorrow, if they still have issues, I'll continue to find a way. 

Updated July 28:

I checked with my client this morning and he had cut 14 checks without crashing. Usually, he would get maybe 1 or 2 checks before crashing. Again, this fix may not be for you, but I do see something that was running "cefSharp.BrowserSubprocess". So that tool embeds "chrome-lite browser" functions into something. I'm sure it has something to do with how the Chrome-lite browser integrates with Edge or Chrome, but I could be wrong since I did not build this software. I would contact Intuit and ask for an R5 fix from some of the users who posted below. It seems like they got a workaround fix.