While using my computer (RDtabs minimized, no sessions open within it) I noticed that my hard drive was running like crazy. I opened Task Manager and noticed RDtabs consuming memory like mad... it went from around 20MB steadily up to about 56MB. Mind you, this was with no open sessions and no RDP connections. Once it got up to about 56MB, it dropped back down to 15MB, then started climbing again. What causes this? It slows down my system when it happens.

Welcome to the .Net Framework! What was probably happening was garbage collection. The framework finalizer was probably running and swapped RD Tabs out of the pagefile, back into memory, then freed unallocated resources, and went back to sleep (or repeated the cycle a few times). I'm speculating here, but it makes sense.

There's not much you can do about it other than add more RAM or optimize pagefile settings...

Remote Desktopping is a fairly resource heavy task, so you are likely to run into more intense garbage collection than with smaller .Net applications. I've never encountered anything that reduced my overall PC performance, even on my old laptop (Sempron, Vista, 1.5GB ram), even with Visual Studio running (a massive resource hog). Is your PC fairly new?

It's not terribly old; Pentium D 3Ghz w/ 1GB RAM. I have other stuff running, including Opera, which tends to eat up memory as you open and close tabs (something all current Web browsers seem to do, which is rather annoying). Thanks for the update.