i got 26.36 Mbps download and 6.08Mbps upload.  I haven't done speed test in years. I forgot what I Comcast speed  suppose to be.  

Did you do a Clean Remove and Run DDU before you put back on 373.06
Re-Check your Firewall setting that you are Allowing Access to the Client Software.
What Changed in the last few Days? Windows Updates? What OS are you Running? 
 

I would say the Drop was Due to the NVIDIA Graphics Drivers.
 

Mekhed
Failed WUs can be the result of an unstable machine or unstable overclock. If you are over clocking, you might try running your normal clocks to see if it helps. Failed WUs can also be the result of just poor WUs like what we saw a year ago at the start of the 2015 TZC. The first week of that TZC we saw a lot of issues.

 
We have been having NVIDIA Driver Issues for the last 2 Driver Versions and Right Now 373.06 is the last Driver that works on Folding Projects.

Any network issues might be due to that massive DNS DDOS attack that beens going on lately.  But the drivers have been pretty bad this generation.

i rolled back to  373.06 2 days ago. 

ipkha
Any network issues might be due to that massive DNS DDOS attack that beens going on lately.  But the drivers have been pretty bad this generation.

That or the OP may have hit the Comcast Data Limit for his area.

Thank you for all your help. 
Looks like it is folding and I am getting points. I followed bcavnaugh's advice use DDU to uninstall the driver and installed 373.06 and FAH client  again. Thank you again. 
 

gammatnt

Thank you for all your help. 
Looks like it is folding and I am getting points. I followed bcavnaugh's advice use DDU to uninstall the driver and installed 373.06 and FAH client  again. Thank you again. 

Glad to here you are back up and Folding
And Thank you for the above.