Windows 7 ultimate, unable to detect my nexus 4 5.01 My windows 7 ultimate laptop isn't recognizing my nexus 4 5.01. Tried to reinstall ADB drivers and android universal usb drivers, but no use. 

can anyone please let me know how to overcome this problem?

thanks in advance!!!!!!
Download drivers from here

source: XDA forum - Nexus 4 driver for Windows

If this also doesn't work then there is discussion on XDA forum if you are using Universal naked driver.
(OR) Above all, save data on Cloud and Factory reset.