Hi Ajeet,
You have two issues:
"Antivirus scan action showing "Virus Found(Access Denied) virus name is W32.Downadup and folder name c:\windows\system32\oontiz.y"
The oontiz.y file will be running in the task manager
Open the command prompt and the remove the attributes.
C:\WINDOWS\system>attirb oontiz.y -r -h -s
Go to the Task Manager and kill the particular file oontiz.y
Scan only the windows\system folder and this will be deleted.
"Antivirus scan action showing "Virus Found(Partially repaired,"
Open the logs select the particular virus which is showing as "Partially repaired" right click and select "Properties" this will give the exact details.