i had winhound on computer ,but i believe i succesfully remove it except in the registry in HKEY_LOCAL_MACHINE\SOFTWARE\WINHOUND.com it will not allow me to remove key entries it says "Cannot delete Winhound.com: Error while deleting key" Thanks

Please post a Hijack This log so that the files associated with the virus/spyware/hijacker can be identified. You can download Hijack This at this link http://www.tomcoyote.org/hjt/ then place it into a folder of it's on, such as C:\HJT, so that back up copies can be made and not clutter your desktop or other folders and the backup copies of deleted items can be easily located if needed. Once saved double click HijackThis.exe, and press "Scan". When the scan is finished, the "Scan" button will change into a "Save Log" button. Press that, save the log, Ctrl-A to Select All, and copy its contents into the text editor at this forum. Do not fix anything yet unless you know what you are doing. This is a powerful tool that can crash the computer if used improperly. Download smitremfix from this link http://noahdfear.geekstogo.com/ to your desktop.Open the file and it will extract itself to a new folder called SmitRem.(don't run it yet) Download Adaware SE from this link http://www.lavasoftusa.com/software/adaware/ ,update it but (don't run it yet). Download Ewido Security Suite then set it up this way Ewido Setup Instructions reboot into Safe Mode Now open the SmitRem folder. Find the RunThis.bat and click it. Make sure all other open windows and programs are closed. If you haven't done this, then the program will remind you.Follow the onscreen direction and let smitremfix run, then disk clean will run(take a few minutes. Run Ewido When the scan has completed, Ewido will create a report.txt file. Click the "Save Report" button on the bottom of the screen and save the log to your desktop in case you need it later. Run Adaware SE Post the ewido log and a second HT log.

Here is an answer. You can use the RegDelNull tool to delete that registry key.

After WinHound has been detected on system try to remove it using directions here: WinHound