Friends i m fed up of this viruses fun.exe dc.exe sviq.exe EVEN if i
remove it from the task manager it comes BACK even if i go in SAFE mode
and delete their respective folder in c: drive and delete from task
manager they are againshown in task manager can i remove this viruses.
( if possible PROVIDE the solution without using antivirus )

Also i have problems with regsvr.exe,wscript.exe,winhelp.exe
Download and rename HijackThis (HJT)

• Double-click on HJTInstall.
• Click on the Install button.
  
• It will automatically place HJT in C:\PROGRAM Files\TrendMicro\HijackThis\HijackThis.exe.
  
• Upon install, HijackThis should open for you.
• Close HijackThis and rename it.
  
• Go to C:\Program Files\Trend Micro\HijackThis.exe
  
• Right click on HijackThis.exe and select Rename.
  
• Type in sniper.exe and press Enter.
  
• Right-click on sniper.exe and select Send To > Desktop (create shortcut)
  
• From the desktop open Hijackthis.
• If using Windows Vista, Right-click and Run As Administrator.
  
• Click on the Do a system scan and save a log file button
  
• Hijackthis will scan and then a log will open in notepad.
• Copy and then paste the entire contents of the log in your post.
  
  • Do not have Hijackthis fix anything yet. Most of what it finds will be harmless or even required.