iPhone 4 not detected by computer

[JONOyou]

Hello, I have an iphone 4 (32gb) running ios 7.1.1 When i connected to my laptop it makes a connection sound. However, no sign of the iphone connection is present. Not in my computer, no itunes error, nothing. Also, my calender birthday notification just came up the same time i connected my phone - both my laptop and iphone. The phone is also not charging when connected.

I have tried different usb ports and usb wires. I have tested the ports using my usb storage and worked fine. The phone also charges fine when the usb is connected to a powerpoint. Any help is appreciated. Thank you

My laptop specs are:
intel 4702MQ 2.2GHz (3.2Ghz) (4th Gen)
intel hd 4600
nvdia gt 740m (dedicated) - 2gb GDDR3
500gb 7200rpm hard drive
8gb RAM DDR3 1600MHz
windows 8.1 (64bit)

I have updated my BIOS (lenovo) recently and switched antivirus to avast. I havent connected my phone before i got the antivirus so i dont know the cause

 

[JONOyou]

To connect your iPhone with windows you will require iTunes which will be compatible with Windows. Then launch the iTunes in Windows. After that connect your iPhone with computer and your phone is now connected with your computer. You can synchronize the data including contacts, files, music etc with iTunes in your computer.

Hello rudrapratap, i have itunes installed, as i have used this phone for years. I have tried restarting the apple mobile service and other apple-related services. I have also tried restarting the computer into safe mode. This problem happen to both my iphones, but only with my laptop. It works perfectly fine on my desktop. I appreciate your help, and may this narrow down your search. Thank you