Reboot into safe mode following the instructions here & 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 & click 'fix checked' :
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://prosearching.com/searchbar.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://prosearching.com/searchbar.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://prosearching.com/passthrough...as.harvard.edu/
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://prosearching.com/searchbar.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://prosearching.com/searchbar.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://prosearching.com/searchbar.html
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://prosearching.com/searchbar.html
O2 - BHO: (no name) - {9678D0B0-FC6E-1001-FE98-8F8B6030C528} - C:\PROGRA~1\EACHJU~1\IdolWindow.dll
O3 - Toolbar: Tray bike warn - {DC58FA09-C4E4-0B2C-972B-BA59070EB5BD} - C:\PROGRA~1\EACHJU~1\IdolWindow.dll
O16 - DPF: {FDDCE9FF-1FC6-413C-80B1-37B101FDA1D4} - http://download.buddylinks.net/ShellInstaller.cab
Delete these folders:
C:\PROGRA~1\EACHJU~1<<<<
C:\PROGRA~1\EACHJU~1<<<<
Reboot normally.
You have the beagle virus & possibly others. Go here for an on-line scan & set it to autoclean for you.
Post a new log after.