While VPNs are great for privacy, some anonymizing services introduce header modifications or IP blacklisting. GridinSoft’s security checks may interpret this as a potential man-in-the-middle attack and refuse the connection.

When it’s likely a vendor-side incident

Understanding the root cause speeds up troubleshooting. Here are the top seven reasons why GridinSoft Anti-Malware throws the "server is busy" alert:

Ironically, sophisticated malware (especially rootkits and ransomware) actively tries to disable or block security software. One common tactic is redirecting or throttling connections to antivirus update servers, causing the "server is busy" message.

Corrupted client or configuration

Local network or DNS problems