Solved COM & LPT Ports Missing

Hewlett-packard Compaq presario s3100nx...
January 28, 2010 at 08:17:18
Specs: Windows XP
After re-installing windows XP I discovered my COM & LPT ports missing. Right now I'm obviously not all that worried about printing, however I do need to get online.

I've attempted turning my computer off, then back on, in hopes of that being the problem, however it doesn't appear to be that.

I've also attempted to manually install it off the XP disk, only to discover that I can't even find the ports on the disk, either.

Because of this I've run out of options; I prefer windows XP to vista so I don't want to borrow a disk and just upgrade in hopes of a quick fix. Is there anywhere I can go to just download it online onto a disk?

See More: COM & LPT Ports Missing

January 28, 2010 at 08:22:11
✔ Best Answer
first confirm ports are enabled in bios
review Device manager. Are they listed but with yellow exclaimation points? if so you need to install the mainboard drivers for those ports.

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January 28, 2010 at 08:23:02
... go to "start" run (type) hdwwiz.cpl [press enter]

... click "next"

... check "yes" I have added device click next

... select communications port from list click next


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January 28, 2010 at 12:23:42
As wanderer said, the Com (serial; asychronous) port(s) and LPT (parallel) port must be enabled in the mboard's bios Setup.
Most parallel port connected devices require that the LPT (parallel) mode be set to EPP or ECP in the bios - the default may be otherwise - usually EPP works fine.

"After re-installing windows XP....."

Did you load the drivers for your mboard? If you didn't ....

Whenever you load Windows from a regular Windows CD (or DVD) from scratch, after Setup is finished you must load the drivers for the mboard, particularly the main chipset drivers, in order for Windows to have the proper drivers for and information about your mboard hardware, including it's AGP or PCI-E, ACPI, USB 2.0 if it has it, and hard drive controller support. If you have a generic system and have the CD that came with the mboard, all the necessary drivers are on it. If you load drivers from the web, brand name system builders and mboard makers often DO NOT have the main chipset drivers listed in the downloads for your model - in that case you must go to the maker of the main chipset's web site, get the drivers, and load them.

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January 28, 2010 at 12:41:51
See the last paragraph above in #3.

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