Running Win98SE on old box used for internet and MS Office. Using HP Deskjet 690C. One day printer fine, next day prints only garbage. Reinstalled printer driver and checked all settings. No improvement. Tested communications with LPT1 port and this failed. Have second box running XP with Deskjet 710C working fine. Tested both printers on XP box - both cables and printers fine. Checked system on 98 box and LPT is reported to be working. Old 98 box working super otherwise. Confess to fiddling in registry. Have I done a whoopsy and if so can someone help please.