Knowledge base for software setup, errors, and daily tool work.

How to Check PHP Memory Limit for Composer

If Composer fails with an error like Allowed memory size of X bytes exhausted, your ...

How to Clear SSH Known Hosts and Fix Host Key Verification Failed

How to Disable Command Prompt High CPU Usage from Startup Services

If you notice that Command Prompt (cmd.exe) is consuming a lot of CPU right after boot, it's ofte...

Windows Update Failed to Install Manually: Practical Fixes

You download a Windows update from the Microsoft Update Catalog, double-click the .msu file, and ...

How to Fix WinRAR Checksum Error and Repair Corrupted Files

You download a large RAR archive, double-click to extract, and get a "Checksum error" or "CRC fai...

How to Fix Windows Activation Stuck in Loading Loop

You open Settings > Activation, and it just spins. No error, no timeout—just a perpetual loading ...