is this sign of malicious/suspicious activity?

NIS 2011
Vista Home Premium 32 bit

I use the windows sidebar gadget thing where it will show a clock a calandar, etc

Well just notice that when I open windows task manager, I see two instances of sidebar.exe
Both are listed as the owner user
when I log in under the admin account, there are 2 instances again, but owner as admin

is it normal to have 2 instances of sidebar.exe?
or is it malicious/suspicious sign?