Good evening,
I have been trying to figure this one out all day. We are a small company with a dozen or so computers regularly hitting the main server with all of our data on it via mapped network drives. This has been working pretty much fine as long as I can remember being here (5 years almost) and we have an old version of Symantec Endpoint on the server, 12.1.4xxx.
Today I rebooted the server after personally being effected by trying to open a large excel sheet (database work is my main task) and it would just hang and eventually ive me an error about the application was waiting and fail. Other users were seeing just slow movement around the network, folders taking 5-30 seconds to open.
I found that if I turned off Endpoint entirely the problem goes away company wide. I personally tried opening my excel sheet on one monitor and on the other I turned off Endpoint on the server and my file stopped hanging and immediately opened. I tried again but this time only turned off the Network Threat Protection portion of Endpoint. Then finally tried again by only re-enabling Network Instrustion Protection and Browser Intrustion Prevention (leaving only the Firewall disbaled) and it continues to work just fine, the minute I turn the firewall back on, it dies again.
Anybody seen this before? I do not use Endpoint much, I inherited this when I Took the job as database manager, I was able to get into the primitive web console to try a few things out but nothing worked. I figured it might be a logging thing, like the logs are full type of deal? But could not figure out how to clear them, the only reason I Thought that is because of the fact that I don't change anything much on the server , especially with Endpoint, the only thing constantly changing is logs.
Any advice would be appreciative. I do not know what would cause this all of a sudden, it's quite strange that's for sure.
I did notice under Network Threat Protection there is "Definitions" that updated Sept 13, 2019 (friday) and says r61 after it, is there a way to roll whatever that is back and test?
Thanks for any help