Why is svchost.exe (imgsvc) spiking my CPU after boot?

After the last Windows update, svchost.exe (imgsvc) may use a lot of CPU for a few minutes while it runs background tasks. This is normal and usually goes away on its own. If the high CPU use doesn’t stop, try running the Windows Update troubleshooter, checking for new updates, running the system file checker (sfc /scannow), or temporarily disabling your antivirus. If the problem continues, you might need to undo the update or use System Restore to fix it.