If you encounter an access denied or file in use, use a tool like lockhunter (https://lockhunter.com) to get rid of that DLL. Source: 9 months ago

Https://lockhunter.com/ give this free tool a shot. It should show you what's locking it. Source: 12 months ago

I tried downloading an unlocker program to see if maybe any processes were stalling it, but not even that could remove the file. I'm completely at a loss. I could just ignore the file for the rest of my life, but I'd really rather not with how concerningly broken it is. Source: 12 months ago

If you have write access to that filesystem... Maybe there are open files or folders, something is keeping it in use Try rebooting, or you can try LockHunter: LockHunter is a free 64/32 bit tool to delete files blocked by any processes. Source: about 1 year ago

If it isn't that, here's this neat tool you can use to nuke processes using files and folders. Source: over 1 year ago

Cisco Umbrella | Leader in Cloud Cybersecurity and SASE Solutions. Source: about 1 year ago

A combination of subscription ip blocklists like that sold by MaxMind combined with DNS and application filtering services like Umbrella would catch most services. For good measure I'd toss in local .exe application whitelisting running on each of the schools machines to only allow the applications the school wants using something like applocker which is included in windows so it probably fits into their budget. Source: over 1 year ago

We've been very happy with Cisco's Umbrella product. A few years back I "test drove" the free version, but thats a very poor substitute for the paid product. It's not cheap, but it has worked very well for us. Over 70% of our users are remote since the start of COVID, so we opted for the "roaming client" installation on every endpoint. We have a "basic" network profile for our office locations that slightly... Source: over 1 year ago