No it isn't normal, but the causes reside elsewhere, namely the problems that are doing all that calling. Two obvious areas to check are:
1. What applications do you have running at start up? Many of these can be eliminated. The upside is that you can boot faster, and since each of these uses a slight amount of memory hanging around until you need, this will increase your resources; the downside is that you may have to wait slightly longer to launch an application.
Use the BC Start-up Database to determine if you need all that stuff running in the background (you have MSN messenger for example).
2. Adware and other malware. You may wish to submit a HijackThis! log to our volunteer team of experts for review for malware. I might tend to be suspicious if I saw that kind of usage for iexplore.exe and explorer.exe. because a lot malware hides there.
Instructions are here:http://www.bleepingcomputer.com/forums/How...s-Log-t956.html
Hope this gives you some help,