From last month or so i am getting this annoying problem, whenever i open a IE / Word/ Notepad automatically the letter "X" starts to write, it does not stop at all .... sometimes it stops by pressing the backspace... but again it starts.

This has also slowed down my system.
I tried using the No Adware and Spybot search and destroy. Both of them could not remove this problem.
I have ordered Webroot antiviurs and antispyware software. I will try with that.
Is this a virus or spyware ? Does anybody have clue of removing this ?
Help would be really appreciated.
Cheers
Ashish