Sound mute?

Hey there, im a new person on TH, so i hope you could help me by my problem!

i recently started making a horror game for pc! but in the process (2nd day)
my sound got "removed", like constantly, when i go to change the volume in the taskbar, the "soundvol.exe" task stops responding.
- Also when i go to the properties of sound devices (Settings for pirmary sound device, microphone, other) - it works, but after 2 min. it stops responding with this alike head-title: "DLL-file with same dialogbox for the userinterface in windows doesnt respond." - (im Danish with danish language on my lap.)

My specs:

Windows Windows 7 Home Premium Edition (64-bit) Service Pack 1 (Build 7601)
Internet Explorer 9.0.8112.16421
Memory (RAM) 4095 MB
CPU Info Intel(R) Core(TM) i7 CPU Q 720 @ 1.60GHz
CPU Speed 1600MHz
Sound Card IDT | Sound Card

Display Adapters ATI Mobility Radeon HD 4650 | ATI Mobility Radeon HD 4650 | RDPDD Chained DD | RDP Encoder Mirror Driver | RDP Reflector Display Driver
Monitors 1x; Standard PnP-skærm |
Screen Resolution 1600 X 900 - 32 bit
Network Network Present
Network Adapters Microsoft Virtual WiFi Miniport Adapter | Dell Wireless 1520 Wireless-N WLAN Mini-Card | Realtek PCIe GBE Family Controller | Hamachi Network Interface

CD / DVD Drives 1x (D: | ) D: HL-DT-STDVDRWBD CA10N
Ports COM Ports NOT Present. LPT Port NOT Present.
Mouse 8 Button Wheel Mouse Present
Hard Disks C: 465,7GB
Hard Disks - Free C: 318,3GB
USB Controllers 2 host controllers.
Firewire (1394) Not Detected
Manufacturer * Dell Inc.
Product Make * Studio 1747
AC Power Status OnLine
BIOS Info | |
Time Zone Rom, normaltid
Battery Status High
Motherboard * Dell Inc. GEA31U
IP Address 192.168.1.128 | 5.134.32.19 |
MAC Address 7A-79-05-86-20-13
Host Name TOBIAS-PC
SM BIOS A11


- Thank you