It sounds like NewDotNet hijacker. Go to Add/Remove Programs and there uninstall these entries if you find it:-
NewDotNet
New.Net
Also, download NewDotNet uninstaller and run it, even if you uninstalled from Control Panel.
IF you cant find NewDotNet entry in Msconfig, copy the below text present inside the "Code" box into NotePad:-
Code:
regedit /e test1.txt "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run"
regedit /e test2.txt "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce"
regedit /e test3.txt "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices"
regedit /e test4.txt "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices"
regedit /e test5.txt "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce"
regedit /e test6.txt "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run"
regedit /e test7.txt "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects"
copy test1.txt + test2.txt + test3.txt + test4.txt + test5.txt + test6.txt + test7.txt = info.txt
del test1.txt
del test2.txt
del test3.txt
del test4.txt
del test5.txt
del test6.txt
del test7.txt
Go to File Menu>
Save As and type the filename as
Run.bat and save it. Exit from NotePad.
Double-click on the Run.bat file, a DOS type window opens up, after few seconds close it. There will be text file named
Info.txt in the same location where Run.bat is present. Open that text file and copy it's contents and post it here.