No USB 2.0 after reinstall

[knottshawk]

I know this is a stupid and simple question, but I can't find the answer I need.
I have an hp a1750e and, after a reinstall of Vista, I seem to be missing USB 2.0.
My devices are having difficulty being detected and a thumb drive which used to work for readyboost, now says it's not a device capable of this. So, what do I need to do to rectify this?

Thanks

 

[daship]

You need to download the chipset drivers and the usb drivers from HP support.

 

[knottshawk]

Here's the link to my computer's HP page... I don't see the chipset or usb drivers listed.

http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=2093&lc=en&dlc=en&cc=us&lang=en&product=3369460#