i have a compaq presario 6240IN.it was in non use for 6 months.when i started recently it is not showing usb controlleres in device manager.i have DOWNLOADED infinst_autol chipset DRIVERS but still the problem persists.i have made changes in USB legacy mode in BIOS set up without any difference.tape drivers are missing.

kindly advice

siddharthHave you perhaps disabled the device in the BIOS?

USB Legacy is not quite related.i have entered enabled INSTEAD of auto in the usb legacy mode but have not touched USB in BIOSWhat happens when you connect an USB device?

What version of Windows is installed?

What were the problems with the PC prior to putting it away?operating system is windows XP and there were no prior probems and all usb devices were working satisfactorily.but now when i load a recently purchased i pod it is obviously not recognized by the computer as the usb is absent in the device managerYou're virus and spyware free?yes.besides the disc formating was ALSO done.You have Servicepack 2  installed?it is pack 1That MIGHT be your problem. Update to Service Pack 2.hihi
the problem was ultimately solved by taking out the CMOS battery for a couple of minutes with the help of www.usbman.com

anyway thanks for your support and time.

siddharthThat's not right. Your CMOS battery might be running low if the BIOS is acting up. You should replace it just in case.