First right-click on your desktop and select New, Folder; give the new folder a name like HJT, and then drag the hijackthis.exe icon that is on your desktop into the new folder.
Scan with HijackThis and have it fix the following entries:
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://ie.redirect.hp.com/svs/rdr?TY...ion&pf=desktop
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://ie.redirect.hp.com/svs/rdr?TY...ion&pf=desktop
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://tidbitsmedia.com/members/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://ie.redirect.hp.com/svs/rdr?TY...ion&pf=desktop
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://ie.redirect.hp.com/svs/rdr?TY...ion&pf=desktop
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://ie.redirect.hp.com/svs/rdr?TY...ion&pf=desktop
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://ie.redirect.hp.com/svs/rdr?TY...ion&pf=desktop
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://ie.redirect.hp.com/svs/rdr?TY...ion&pf=desktop
O21 - SSODL: bestreak - {874443fe-aa33-4ebf-a6ac-73208787e62d} - C:\WINDOWS\system32\viruxz.dll (file missing)
Close any open browser windows before hitting the Fix button.
Go to C:\WINDOWS\system32 and delete viruxz.dll if present.
Get and run CCleaner (go to the 'Cleanup' link in my signature block below).
Update AVG and run a full system scan.
Let us know if you still have problems.