Input from those running multiple accounts on one machine.

[Krago]

The other thing I noticed a couple nights ago, is that after the loader exits and the client starts up, it leaves an instance of rifterrorhandler.exe running for each client you start.

This process loads the CPU and caused a lot of slowness on my PC.
After starting all the clients up, make sure you kill the rifterrorhandler.exe process for each client.

[Bloodcloud]

The other thing I noticed a couple nights ago, is that after the loader exits and the client starts up, it leaves an instance of rifterrorhandler.exe running for each client you start.

This process loads the CPU and caused a lot of slowness on my PC.
After starting all the clients up, make sure you kill the rifterrorhandler.exe process for each client.

hmm, might give that a try tonight.