After commenting on your question yesterday I had enough trouble connecting to an HP 7.1 tablet. The manufacturer's website simply does not provide a driver.
The solution briefly based on the links at the end of this post is, use the usb driver provided by google. Usually found in the SDK directory:
C: \ Users \ UserName \ AppData \ Local \ Android \ sdk \ extras \ google \ usb_driver \ android_winusb.inf
In this file, I had to add the lines to my specific device:
Ifyourdriverisalreadyinstalled,justgetthemanufacturerID,rightaftertheVID_:
USB\VID_03F0&PID_6C1D&MI_01
AddthisIDtotheADBdevicesconfigurationfile:
C:\Users\User.android\adb_usb.ini
>#ANDROID3RDPARTYUSBVENDORIDLIST--DONOTEDIT.>#USE'androidupdateadb'TOGENERATE.>#1USBVENDORIDPERLINE.>0x03F0
Iusedtheandroid_winusb.inifiletoinstalltheAndroidDeviceDriveronmyWindows.ItworkedonlyonWindowsXP,IhavenottesteditagainonWindows8.Iknowthatonwindows8itisnecessarytodisabletheunsigneddriverinstallation.
AfterthisrestartADB:
adbkill-serviceadbstart-service
Oncethiswasdone,thedevicewasreadbyADB.
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