Sometimes the issue isn’t on GridinSoft’s end at all. Your own firewall, VPN, proxy, or security software might be blocking or throttling connections to GridinSoft’s servers. This can mimic a “server busy” error because the client fails to get a timely response.
Packet loss, high latency, or ISP throttling can cause GridinSoft’s requests to time out. Since the software is programmed to show a user-friendly error, it defaults to "server is busy" rather than "network unreachable." gridinsoft anti-malware the server is busy
An incorrect date/time can break SSL certificates used to authenticate GridinSoft’s servers. Sometimes the issue isn’t on GridinSoft’s end at all