It may be though that you unknowingly have the HP printer driver installed. Go to Control Panel / Printers and check what you have installed and set as default. I know that sometimes you wont get True Type fonts without an approriate printer driver installed even if the printer isn't physically connected. Could be something as simole as that.
Also check what is running in the background by going CTRL ALT DEL, may have some conflicting and unnecessary TSRs. Good Luck