Windows 7 problem not working of audio sound,no scf sca

[atedisons]

I'v buyed Dell studio 1555 with Windows 7 Home Premium(64 bit).I had uninstalled power dvd(pre installed by Dell) using Revo uninstaller ,inadvertently I deleted some of the registry files.
Now facing various problems...
First there is no audio sound(no mp3,no login sound, no keypad sound..)..

then on changing monitor settings through keyboard buttons there is no graphical display of the monitotr status ...

when i tried to run sfc \scannow (in cmd prompt as Administrator) it shows "Windows resource protection could not start the repair"

when I tried to open Disk Management utility an error dialogue box stating "Disk management could not start Virtual Disk Space..This happen if remote computer does get supported or if connection cannot be established..."

My system details:dell studio 1555,windows 7 Home Premium(64 bit),core 2 duoT6600,320 GB HD SATA,3 Gb RAM

Its annoying Pls Help me...

 

[richc46]

Did you try System Restore?

 

[Dwarf]

Hi atedisons and welcome to Windows 7 Forums

Reinstall Windows 7 using the disks supplied or by installing from the recovery partition (see manual). If you want to remove Power DVD (or any other programs that Dell have installed), then you should be able to do so from here:

Programs such as Revo Uninstaller can only work if they were installed before hand and can monitor the installation of a program.

 

[atedisons]

Thank you very much for your concern brother,
I have reinstall win 7 Home Premium through PC restore.

I have got the problem in creating new Volume.

Before PC restore process I have already made 142 GB as "Free Space" and 146 GB in C:/ Drive of 320GB SATA HD.

Now the OS is in 146 GB partition.I made a shrink, to have 80 GB in C:/ Drive .

As a result an unallocated partition 66GB is formed between Drive(C) and Free space.

I tried to create a new simple volume out of 66GB, but after clicking Finish button at the end it shows
"You cannot create a new volume in this unallocated space because the disk already contains the maximum number of partitions".

After this surprisingly I have created two Logical partitions(50 GB & 52 GB) from the Free space leaving 40 GB.

Please help me how to create a primary partition out of unallocated 66.42 GB partition.

My disk Management show (as in order)
Healthy(OEM)-198 MB,
Recovery-9.12 GB,
OS(C)-80 GB,
unallocated-66.42 GB,
Drive(G)-50 GB,
Drive(H)-52GB,
Free space-40GB.

My system detailsell studio 1555,windows 7 Home Premium 64 bit,core 2 duo T6600,320 GB SATA HD,3GB RAM.