Member Avatar for COTSIOS

i cannot use properly a usb memory device on my fujitsu-siemens amilo D8830 and i have try almost everything with drivers and bios updates.
Does anyone knows how to fix this problem?
Thanks

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Dani AI

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Practical, step‑by‑step checklist for intermittent or very slow recognition of USB flash drives and card readers on an Amilo D8830. This expands on points raised by and with actions you can apply immediately and safely — make a backup or System Restore point before changing drivers or the registry.

  • Show hidden (ghost) devices and remove stale USB entries:

    set devmgr_show_nonpresent_devices=1
start devmgmt.msc

    In Device Manager choose View → Show hidden devices, expand USB and Disk drives, uninstall any faded/unknown entries and any yellow‑triangle devices. Then reboot.

  • Reinstall USB controllers and reset power options: in Device Manager uninstall each "USB Root Hub" and "Host Controller", reboot so Windows redetects them. For each USB Root Hub open Properties → Power Management and clear "Allow the computer to turn off this device to save power."

  • Rebuild the INF cache (fixes long driver‑install hangs): boot to Safe Mode, open a command prompt and run:

    cd \Windows\inf
attrib -h -s INFCACHE.1
rename INFCACHE.1 INFCACHE.old

    Reboot normally and plug the device back in.

  • Check detection and mounts: run msinfo32 → Components → USB to confirm controller type (look for "Enhanced" = USB 2.0). Run diskmgmt.msc to see if the device appears without a drive letter; assign a letter if needed (do not format unless you intend to lose data). Use eventvwr.msc → System to capture error messages when you plug the device in.

Other useful checks: try a powered USB hub (rules out port power issues), temporarily disable resident security/antivirus, and toggle relevant BIOS USB options (Legacy USB, EHCI). If Windows still fails but a Live Linux CD/USB sees the device instantly, suspect a Windows/driver problem; otherwise suspect a hardware fault and contact Fujitsu‑Siemens support for chipset/BIOS guidance.

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Member Avatar for DMR

Can you tell exactly which USB devices are giving you trouble, and what exact errors or symptoms you get when trying these devices?

Also tell us which version of Windows you're using, including Service Packs.

Member Avatar for COTSIOS

I am using Windows XP SP1 (WinNT 5.01.2600) and basicly i am having problems with usb flash memory devices, and usb card readers. The problem is that when i plug them in it takes ages to recognise them and some times it doesnt.

Member Avatar for COTSIOS

Everything is up to date on my laptop and i have all the latest drivers of devices like that but not mine or others of friend of mind don't work on my laptop and all of them work on different machines

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