General Problems

A SHA-256 digest can help detect whether a downloaded file differs from a reference value. It does not, by itself, prove who created the file. The ref...

If a website opens on a phone but not on one computer, the server may still be healthy. Compare the failing computer with a working device to isolate ...

When a user cannot sign in, restarting a domain controller is rarely a useful first test. Determine whether the failure affects one account, one works...

A server that restarted overnight has not necessarily suffered a blue-screen crash. Power loss, a hypervisor action, an administrator restart and a Wi...

A Windows server can be fully patched and still expose an unnecessary remote administration service. It can also have a carefully restricted firewall ...

When an application cannot reach a server, split the problem into smaller questions. Does the name resolve to the expected address? Can the client est...

A slow file copy, a database timeout and a long login can all involve storage, but they need not have the same cause. Start with the volume used by th...

A busy CPU during a scheduled report is different from a CPU that stays busy after the report finishes. Likewise, a database using a large amount of R...

“The server is down” can mean several different things: a website returns an error, Remote Desktop cannot connect, a file share is slow, or the operat...

Server management is one of the most critical topics for system administrators and developers. Ensuring the stability of servers, improving performanc...