HP ProBook 450 G2: 'brrrp' sound while playing music on the HP ProBook 450 G2

I recently bought a hp probook 450 g2 (product number: k7j64es) and have the following problem:

When music plays the phone has more or less frequently that his "brrrp. It sounds like this but is only half a second short and subsequently the music continues to play normally.

its very annoying when occurs several times in a row.

More often, while the buffering of videos (youtube, etc), but also when you use windows media player.

I had this problem on the two professional win7 x 64 and win8.1 update sp1 x 64 with the latest audio driver.

on win8.1 I tried the second latest driver and bios update too. the problem was not resolved.

I bought the laptop without windws and installed all the drivers on my own.

Here is the list of my software

Maybe I didn't install the drivers in a proper order and you could suggest me the right (make a list via copy and paste drivers below).

should I install windows updates before or after installing drivers?

Here I installed the drivers:

Driver Audio Realtek High definition (HD)
Driver Intel Management Engine components
Intel Chipset Installation utility
Intel video driver and Control Panel
RTL8723BE/RTL8188EE Realtek 802.11b/g/n wireless LAN Treiber
Realtek USB and media PCIe card reader drivers
Intel Rapid Storage Technology driver
Synaptics mouse driver
HP Notebook System BIOS Update
HP Hotkey support

Realtek RTL8723BE driver Bluetooth
Treiber Realtek Ethernet-controller as

HP wireless button Driver

and here are those that I have has not installed (if you strongly recommend to include in your list):
Intel Smart Connect driver technology

HP 3D DriveGuard 6

HP Universal Camera Driver
Synaptics Touch Panel power management settings
Validity fingerprint sensor driver
Essential system for Microsoft Windows 8.1 updates

HP UEFI PC-Hardwarediagnose
HP Support Assistant software
Customer HP Download Library Management solutions
Vigyanlabs IPM + software

HP Universal Port Replicator-Treiber
As Replicator Port USB3 3001pr HP Treiber
Treiber as HP 3005pr Port USB 3.0 duplicator
Foxit Business Express for HP
HP SoftPaq Download Manager
HP drive encryption software
HP Client Security Manager
HP Client Security Manager
HP drive encryption software
HP Computrace
Default settings of the system for Windows 8.1

or there is a hardware failure?

Thank you!!!

for the one who me mail... I could not answer your question, I deleted the mail by accident.

for the solution here, you will

Tags: Notebooks

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