Reboot into safe mode following the instructions here & Close all (browser) windows & rescan with hijackthis. When the scan is finished place a check in the box to the left of the following entries & click 'fix checked' :
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://look-today.com/searchbar.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://look-today.com/searchbar.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = look-today.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://look-today.com/searchbar.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://look-today.com/searchbar.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://look-today.com/searchbar.html
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://look-today.com/searchbar.html
O2 - BHO: (no name) - {82DF0AD0-DC22-AA53-5D4F-CC092587AE02} - C:\PROGRAM FILES\BOWS STORE\THISPOLL.DLL
O3 - Toolbar: Less Comp - {57E826A0-1AD8-9C79-60B8-33EC3B0FBEDA} - C:\PROGRAM FILES\BOWS STORE\THISPOLL.DLL
O4 - HKLM\..\Run: [ZTgServerSwitch] C:\Program Files\support.com\client\lserver\server.vbs
Delete the following manually:
C:\PROGRAM FILES\BOWS STORE< folder
C:\Program Files\support.com< folder
Regarding the server.vbs file, read this first & you decide what you want to do.
*ZTGServerswitch is part of Sony's Vaio support agent - designed by Support.com. Not required if the user does not wish to use the Vaio support agent and regarded as spyware.*
Reboot normally after doing the above then post a fresh log plz.