I am running Windows XP SP3 and when I do Alt-Tab to tab between open applications, I see a symbol for DSD_2848. If I click on it, nothing gets displayed. I do not recognize it obviously. Does anyone what is it?

I assume it is not a 'problem' because Malwarebytes Anti-Malware, Super Antispyware and Ad-Aware Antivirus have not detected anything.

TIA,
Luis