Please re-open HiJackThis and scan. Check the boxes next to all the entries listed below.
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKCU\..\Run: [Gadwin PrintScreen 2.6] C:\Program Files\Gadwin Systems\PrintScreen\PrintScreen.exe /nosplash
O4 - Startup: BJ Status Monitor Canon PIXMA iP1500.lnk = C:\Documents and Settings\Owner\cnmss Canon PIXMA iP1500 (Local).exe
Now close all windows other than HiJackThis, then click Fix Checked. Close HijackThis.
That's pretty much as far as we can really go.