USB ports problems

Clarifications

I would hazard a guess that the drivers for the USB didn't get properly installed when you installed 7 to it and you need to do it again.

If these USB Ports worked previously then the most likely thing is that you have some kind of infection and need to Scan the system to remove it.

Col

I have tried the Open the Hardware and Devices troubleshooter and nothing came up. I tried then Reinstall USB controllers.

This method resolves steps where the currently loaded USB driver has become unstable or corrupted.
Click Start, then type device manager in the Search box, and then click Device Manager.
Expand Universal Serial Bus controllers. Right click a device and click Uninstall. Repeat for each device. Once complete, restart your computer. Your USB controllers will automatically install. and all USB controllers got installed and it even installed my integrated webcam as a USB. However, when I connected my USB mass storage, it read it. At the moment to remove it, I got this message: "This device is currently in use. Close any programs or windows that might be using the device, and then try again". Of course the USB mass storage is closed and I don't have any programs opened. And this is the problem I always have when I have to remove the mass storage usb, so I go to My Computer, right-click on the usb mass storage and click Eject and select Continue. That is the problem I always have.
And as I connected the printer, in Devices and Printers, it shows with the printer series but in Unspecified section.
:(

After a clean install one can run into some driver issues due to the new updates. I recommend a "files and settings transfer" in the future. After a full virus and malware scan of course. One step is to go to>Device Manager and right click on the device and right click>scan for hardware changes. Next issue is that many MOBOs such as AMD have Intel drivers. This is common with Ethernet controllers. Google your system w/usb driver problems. Read up on the blogged solutions. Someone usually points to the driver solution. The easiest driver to find will be for the printer. Go direct to the printers website and download. Also sometimes there is a driver disk out there for your system, I found one on ebay once for 8 bucks. For future reference, when upgrading, use third party driver transfer freeware. It will scan and transfer all drivers to a removable disk. Then you can re-load the drivers later. I don't usually have a chance to use this because most of the systems I work on are FUBAR, which I wouldn't attempt a transfer for fear of a virus or worm. Vista to Win 7 upgrades are wishy washy anyway. Hope this helps.

Thanks to you all, I guess I will have to reinstall the OS. Thanks a lot

some applications keep some 'temporary' files around, even after you close the document and stop the application. the O/S may see this and think that the USB device is still 'being used' and will give you that message. Try waiting a few minutes and then try to remove the device. I have had cases where I actually had to reboot the machine before it would tell me that it was 'safe to remove' the usb device.