I have a samusung rv510 laptop with windows 7 and sp 1 which does not recognise any USB devices.
For example: USB pen drives, standard USB mouse. My mouse used to work - now it doesnt.
The built in touchpad and keyboard are not affected.
Checking the Device manager it shows 8 'unknown device' items under the 'Other devices' list.
As the driver software installation window runs it says checking updates, this results in no driver found for all 8 items.
If I delete these and scan for hardware changes I get the same error (no USB devices are plugged in).
Plugging in any device does not even get a response.
There are no greyed out USB devices on the 'show hidden devices' option.
I've uninstalled the USB Serial bus controllers and replaced them with Samsung's latest chipset updates.
I've also looked at the M$ USB fix for problems after SP 1.
I've looked on the postings and tried the 'general fix' and deleting the INFCACHE.1 file.
I did notice that the security settings for users on the infcache.1 file is only read (user has administrator rights) - system is full control.
System restore has no effect.
This is not a hardware problem since Linux runs with full USB access.
All help will be appreciated please.
Edited by westwoodside, 02 July 2013 - 11:41 AM.