Hi I am having the same issues. Quickbook opens fine, but then runs really. Tool me 30 mins to produce 1 invoice.  This been like this for approx 2 weeks

 My surface  is now in the  computer shop as I thought there was an issue with it. The shops that I have 8gb ram, i5, 8th gen. Which meets your recommended speck

 I have used quickbooks for approx 3 years no issues. 

This needs to be resolved ASAP. 

And if there is an issue your end. Then professionalism should be applied. As this is affecting businesses. 

And we should be updated with the most urgency. As I was going to get my laptop reinstalled at a cost. When clearly from your last comment its Not the end user. 

If I'm wrong then please let me know. Naomi