During startup have u ever recieved messege: C:\Program Files\winad client\clientcom.dll.

No, its not any file missing but this error is generated by WindowsXp shell.
Actually clientcom.com is a part of winad.exe which is a spyware.

Startup entry for winad.exe: WinAd

winad.exe description: File winad.exe is a related to TwistedHumor company. It shows commercial advertisements
. From time to time it connects to the Internet and downloads instructions and files.
File winad.exe is related to adware WinAD.

Files related to winad.exe: winad2.dll, WNAD.EXE, WNAD.DAT, WNAD-UPDATE.EXE

File winad.exe removal: WARNING!!! File winad.exe is related to adware.
This is serious violation of ur privacy, ur system is under security threat.