Have been running imacros with 2 GB memory which is max for my netbook for nearly 1 year but lately, troubled with memory leakages again from some websites that slowed down and sometimes, even halted the imacros. Restarting imacros is the way but found it more effective to constantly clear the internet history, caches and memories and other garbage like performing ccleaner except using VBA to do this automatically. The internet garbage can be cleared either through a timer or a trigger that measures the memory of the Task Manager using the following code:

Shell "RunDll32.exe InetCpl.Cpl, ClearMyTracksByProcess 255"