Unzip HJT into it's own permanent folder before doing anything in order for it to create backups. (Not a temporary folder or the desktop & not directly on your hard drive). 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=
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R3 - Default URLSearchHook is missing
O1 - Hosts: comments (such as these) may be inserted on individual
O2 - BHO: (no name) - {82315A18-6CFB-44a7-BDFD-90E36537C252} - C:\Program Files\QuickSearch\QuickSearchBar1_27.dll
O3 - Toolbar: QuickSearch Search Bar - {82315A18-6CFB-44a7-BDFD-90E36537C252} - C:\Program Files\QuickSearch\QuickSearchBar1_27.dll
Reboot & delete this folder:
C:\Program Files\QuickSearch< this one