I've just seen this latest Tascam driver for my us1641 I/O.  Is anyone else using it?
I've been tracking and not wanting to test it, till I've got this next batch done.
Tascam us1641 latest driver update v2.07
Michael

Thanks for pointing that out, I never check updates assuming they had left the 1641 in the dust but I guess not. Another reason to think of Tascam when shopping for an interface-- long term support. 
I mostly use mine with W7 and my portable studio for live gigs. I use my Scarlett with my main DAW on windows 10. I just downloaded it and will test but this will take a long while,, its Summer and I don't come inside much these days..And I don't think my DAW is upto date on windows as it's mostly off line,, don't like to fix what isn't broke right now. the few hours I get to record are not to be wasted updating stuff... 

My pleasure, Johnny V!
I was going to PM you, and then thought a thread might serve us all, better. 
I think I'm going to install and see what happens even though I am in the middle of tracking extra parts; better acoustic guitars and additional vocals, etc
I've also got my us1641 set up with my laptop out in our breezeway, which is bigger than my control room, where my desktop and 18i20/OctoPre MkII are. All the mics are out there. It's quieter and sounds better being more than 2 +1/2 X the size.
I'll post back after the fact....
Michael

Ya I downloaded it to my office machine which is windows 10 updated to the new OS. I have Sonar on it but I don't use it for recording, only reference for the forum.. It has gone into Demo mode for some reason lately and I haven't fixed that as it doesn't seem to matter.. just can't save which I am not doing anyhow.
 
But I would be curious to see if there is better RTL performance at least.
The us1641 drivers from 2014 are excellent and at this point in time there is very little difference between using my Scarlett 6i6 or the Tascam. It's really a matter of desk space and the Scarlett is nice and compact. The Tascam is in a 3 space rack unit with a power conditioner ready to roll to gigs. Looks like we'll be getting another couple years service yet! Not bad for $300!

Yeah, not bad at all!
    I bought mine with the confidence of previous Tascam(a 38, then 4 DA38+ 822PCI card and 4 Teac R to R's  before that)gear.So, this customer support is really encouraging!
    I'm hoping for improved RTL, too, but have had no problems with the last driver/us1641 at all and feel as good about it as my 18i20, too.
Michael

At this point, I've not been to install the Tascam v2.07 driver, though I didn't notice at first that it says (on the Tascam site us1641 download page)     this is a "Windows 10 pre-Creators update".
http://tascam.com/product/us-1641/downloads/
 
I wonder if that means it won't work after that update. It isn't but I don't know why.
Michael

OK Michael I finally had a chance so I hooked the 1641 to my office computer which is running Windows 10 1703 Creative update. 
I downloaded and installed the 2.07 driver without issue. Make note that you need to keep the Tascam OFF until the installer asks you to plug it in ( or turn on) 
Seems to be working no problem on this version. 
Set it as my default audio device and playing Win Amp right now. 
I'm just downloading all the Sonar stuff and will bring it up to date and test later today. 
 
My routine is to test Sonar on the office machine and transfer the downloads to my DAW and Laptop. I then run CCC and it update using those downloads. It's faster and saves bandwidth. 

I got mine installed and working, too. I'd forgotten about the "rules". LOL
No change in RTL, but then I don't suppose nothing really changed in the firmware path. Oh well.....
 
12 msec RTL on the us1641 @ 44.1khz vs my 1st generation 18i20 working nicely at 6.9 msec RTL   ... but I'm not tracking more than a couple channels at a time.
 
Michael

At the Normal setting I'm getting 26 ms RTL @ 44.1. 
 
Seems to work fine I opened a Sonar Project and it plays etc. 
So not sure what they changed but, what ever. They usually post a document explaining the updates. And now I'm not sure why they are claiming the W10 Pre 1703 either as it seems to work fine on that.  

Yeah, I set mine to lowest latency, but have yet to test it. Hope to do some tracking/testing today and will report back afterwards.
I have the drive space to go to 48, but have so many projects started at 44.1, that I suppose a mixer is the best way around the latency with it. Do you use a mixer with yours?
It makes me miss my Mackie 24-8 and Aardvark Q10 (PCI)!
Maybe Tascam will do a post Creators update! LOL
 
Michael