qagentrt.dll is a file belonging to a Microsoft Windows operating system, so it’s clearly not a virus. However, if it’s repeatedly made it to your screen an inopportune moments. It’s the not the first and it won’t be the last time of DLL fill your likely to see.
These error message are a clear sign of a clogged registry. Computers, if allowed to operate without proper maintenance will malfunction, it is only a matter of time before you are staring at that big blue screen of system failure.
Over at the Regzooka website they offer to scan your registry thoroughly to expose any registry problems before they wreak havoc on your hard drive as well as the software to repair them.