For some unknown reason all my USB ports have stopped working and when I look in device manager I find the reference to USB host controller missing, and all my USB devices have a yellow exclamation mark.Have tried scf / scannow as seen in replies to similar problems from other people but negative result. Have looked at websites that supposedly supply free replacement drivers but in the end they ask for payment. Have also tried the "Fix-it" service from Microsoft but seems a waste of time. Would appreciate suggestions in simple terms. Thanks.
Go to your PC manufacture's or motherboard makers website and download the drivers from there. If you are unsure of the make of your motherboard use this click here it will tell you the make/model of your motherboard.
Many thanks for that I will give it a try. Only problem is getting on to the internet with no USB ports , I am using an old spare PC to type this , different components obviously. Anyway I'll try to sort something out and report results. Thanks again.
O.K. have downloaded and installed motherboard drivers and got the found new hardware and your hardware is ready for use , except that it isn't. Now the problem seems to be with the Microsoft drivers , so have uninstalled and re-installed twice but still get the yellow exclamation marks despite the green ticks in the driver details box . Have looked on my original XP installation disc but can't find USB drivers anywhere , went on a website that identified the drivers as faulty , but wanted payment to download replacements . mmm... what next?
After trawling through Microsoft's tech. support pages I have found this was caused by me using a non certified , non compliant make of pocket flash drive , which shut down all usb ports.It is supposed to correct itself if withdrawn and rebooted but in my case it does not. Well at least now I know , but what use is Windows with no usb ports ? Good job I've still got an LPT port for my printer.
Thanks for that Terry , but I've tried most things. According to Microsoft the make of flash drive I bought ( from a supermarket ) suffers from a problem called " babble " so Windows shuts all the usb ports as a safety measure. It's supposed to recover after reboot , but unfortunately mine didn't. C'est la vie .
Errrr.. I'm afraid you've lost me a bit there Terry , what software ? The flash drives these days don't come with any , and rely on XP to sort it out when first plugged in. The other makes of flash drives I have all did this and work fine in my laptop . No , I think it's just this particular flash drive with a documented problem ( cheap imports ) so I'll chuck it in the bin and if I need anything that requires usb access I'll use my laptop . Very much appreciate the suggestions . cheers .